January 16, 2006 Update


Pima County Listing of Native Plants by Family and Genus (1)


This list has been developed as an aid to locating species in the township listings. In the Species Distribution Lists the families, genera and species are organized in alphabetical order by scientific name. The following families and genera have been recorded as being native to Pima County. At this time this list does not include all of the native genera on record as occurring in Pima County.



Abies (Fir) - Pine Family (Pinaceae)

Abutilon (Indian-mallow) - Mallow Family (Malvaceae)

Acacia (Catclaw, Wattle) - Pea Family (Fabaceae)

Acalypha (Copperleaf, Three-seed-mercury) - Spurge Family (Euphorbiaceae)

Acanthaceae (Acanthus Family)

Acanthus Family (Acanthaceae)

Acer (Maple) - Maple Family (Aceraceae)

Aceraceae (Maple Family)

Achillea (Yarrow) - Aster Family (Asteraceae)

Achnatherum (Needle Grass) - Grass Family (Poaceae)

Acourtia (Desert-peony) - Aster Family (Asteraceae)

Adder’s-mouth Orchid (Malaxis) - Orchid Family (Orchidaceae)

Adenophyllum (Dogweed) - Aster Family (Asteraceae)

Adiantum (Maidenhair) - Maidenhair Fern Family (Pteridaceae)

Agavaceae (Century-plant Family)

Agave (Century Plant) - Century-plant Family (Agavaceae)

Ageratina (Snakeroot) - Aster Family (Asteraceae)

Agoseris (Goat-chicory) - Aster Family (Asteraceae)

Agrimonia (Grooveburr) - Rose Family (Rosaceae)

Aizoaceae (Fig-marigold Family)

Alder (Alnus) - Birch Family (Betulaceae)

Allionia (Windmills) - Four-o’clock Family (Nyctaginaceae)

Allium (Garlic, Onion, Wild Leek) - Lily Family (Liliaceae)

Alnus (Alder) - Birch Family (Betulaceae)

Aloysia (Beebrush) - Verbena Family (Verbenaceae)

Alumroot (Heuchera) - Saxifrage Family (Saxifragaceae)

Amaranth (Amaranthus) - Amaranth Family (Amaranthaceae)

Amaranth Family (Amaranthaceae)

Amaranthaceae (Amaranth Family)

Amaranthus (Amaranth) - Amaranth Family (Amaranthaceae)

Ambrosia (Burr-ragweed, Ragweed) - Aster Family (Asteraceae)

Amoreuxia (Yellowshow) - Lipsticktree Family (Bixaceae)

Amorpha (Indigo-bush) - Pea Family (Fabaceae)

Amsinckia (Fiddleneck) - Borage Family (Boraginaceae)

Anacardiaceae (Sumac Family)

Androsace (Rock-jasmine) - Primrose Family (Primulaceae)

Anemone (Thimbleweed, Windflower) - Buttercup Family (Ranunculaceae)

Anisacanthus (Desert-honeysuckle) - Acanthus Family (Acanthaceae)

Anoda (Anoda) - Mallow Family (Malvaceae)

Anoda (Anoda) - Mallow Family (Malvaceae)

Antennaria (Pussytoes) - Aster Family (Asteraceae)

Antheropeas (Easter-Bonnets) - Aster Family (Asteraceae)

Apache-plume (Fallugia) - Rose Family (Rosaceae)

Apocynacaeae (Dogbane Family)

Apodanthera (Melon-loco) - Cucumber Family (Cucurbitaceae)

Aquilegia (Columbine) - Buttercup Family (Ranunculaceae)

Arabis (Rockcress) - Mustard Family (Brassicaceae)

Arbutus (Madrone) - Heath Family (Ericaceae)

Arceuthobium (Dwarf-mistletoe) - Christmas Mistletoe Family (Viscaceae)

Arctostaphylos (Bearberry, Manzanita) - Heath Family (Ericaceae)

Arenaria (Sandwort) - Pink Family (Caryophyllaceae)

Argemone (Prickly-poppy) - Poppy Family (Papaveraceae)

Argyrochosma (False Cloak Fern) - Maidenhair Fern Family (Pteridaceae)

Argythamnia (Silverbush) - Spurge Family (Euphorbiaceae)

Aristida (Three-awn) - Grass Family (Poaceae)

Aristolochia (Dutchman’s-pipe) - Birthwort Family (Aristolochiaceae)

Aristolochiaceae (Birthwort Family)

Arizona-rosewood (Vauquelinia) - Rose Family (Rosaceae)

Artemisia (Sagebrush, Wormwood) - Aster Family (Asteraceae)

Asclepiadaceae (Milkweed Family)

Asclepias (Milkweed) - Milkweed Family (Asclepiadaceae)

Ash (Fraxinus) - Olive Family (Oleaceae)

Asplenium (Spleenwort) - Spleenwort Family (Aspleniaceae)

Aster Family (Asteraceae)

Asteraceae (Aster Family)

Astragalus (Milk-vetch) - Pea Family (Fabaceae)

Astrolepis (Scaly Cloak Fern) - Maidenhair Fern Family (Pteridaceae)

Athyrium (Lady Fern) - Wood Fern Family (Dryopteridaceae)

Atriplex (Orache, Saltbush) - Goosefoot Family (Chenopodiaceae)

Ayenia (Ayenia) - Cacao Family (Sterculiaceae)

Ayenia (Ayenia) - Cacao Family (Sterculiaceae)


Baby Bonnets (Coursetia) - Pea Family (Fabaceae)

Baccharis (False Willow) - Aster Family (Asteraceae)

Bahia (False Goldfields) - Aster Family (Asteraceae)

Baileya (Desert Marigold) - Aster Family (Asteraceae)

Balsam Apple (Echinopepon) - Cucumber Family (Cucurbitaceae)

Barberry (Berberis) - Barberry Family (Berberidaceae)

Barbados-cherry Family (Malpighiaceae)

Barberry Family (Berberidaceae)

Barley (Hordeum) - Grass Family (Poaceae)

Barrel Cactus (Ferocactus) - Cactus Family (Cactaceae)

Bastard-toadflax (Comandra) - Sandalwood Family (Santalaceae)

Bean (Phaseolus) - Pea Family (Fabaceae)

Bearberry (Arctostaphylos) - Heath Family (Ericaceae)

Beard Grass (Bothriochloa) - Grass Family (Poaceae)

Beardtongue (Penstemon) - Figwort Family (Scrophulariaceae)

Bear Grass (Nolina) - Lily Family (Liliaceae)

Bebbia (Sweetbush) - Aster Family (Asteraceae)

Bedstraw (Galium) - Madder Family (Rubiaceae)

Beeblossum (Gaura) - Evening-primrose Family (Onagraceae)

Beebrush (Aloysia) - Verbena Family (Verbenaceae)

Beech Family (Fagaceae)

Beehive Cactus (Coryphantha) - Cactus Family (Cactaceae)

Beggarticks (Bidens) - Aster Family (Asteraceae)

Bellflower Family (Campanulaceae)

Berberidaceae (Barberry Family)

Berberis (Barberry) - Barberry Family (Berberidaceae)

Bernardia (Myrtle-croton) - Spurge Family (Euphorbiaceae)

Betulaceae (Birch Family)

Bidens (Beggarticks) - Aster Family (Asteraceae)

Bignoniaceae (Trumpet-creeper Family)

Birch Family (Betulaceae)

Bird’s-beak (Cordylanthus) - Figwort Family (Scrophulariaceae)

Bird’s-foot-trefoil (Lotus) - Pea Family (Fabaceae)

Birthwort Family (Aristolochiaceae)

Bittersweet Family (Celastraceae)

Bixaceae (Lipsticktree Family)

Blackfoot (Melampodium) - Aster Family (Asteraceae)

Bladder-mallow (Herissantia) - Mallow Family (Malvaceae)

Bladderpod (Lesquerella) - Mustard Family (Brassicaceae)

Blanket-flower (Gaillardia) - Aster Family (Asteraceae)

Blazingstar (Mentzelia) - Blazingstar Family (Loasaceae)

Blazingstar Family (Loasaceae)

Bloodleaf (Iresine) - Amaranth Family (Amaranthaceae)

Bluebonnet (Lupinus) - Pea Family (Fabaceae)

Blue-eyed-grass (Sisyrinchium) - Iris Family (Iridaceae)

Blue Grass (Poa) - Grass Family (Poaceae)

Bluet (Houstonia) - Madder Family (Rubiaceae)

Boerhavia (Spiderling) - Four-o’clock Family (Nyctaginaceae)

Bog Orchid (Platanthera) - Orchid Family (Orchidaceae)

Boneset (Eupatorium) - Aster Family (Asteraceae)

Borage Family (Boraginaceae)

Boraginaceae (Borage Family)

Bothriochloa (Beard Grass) - Grass Family (Poaceae)

Bottle-brush Grass (Elymus) - Grass Family (Poaceae)

Bouteloua (Grama) - Grass Family (Poaceae)

Bowlesia (Bowlesia) - Carrot Family (Apiaceae)

Bowlesia (Bowlesia) - Carrot Family (Apiaceae)

Bracken Fern (Pteridium) - Bracken Fern Family (Dennstaedtaceae)

Bracken Fern Family (Dennstaedtaceae)

Brassicaceae (Mustard Family)

Brickellbush (Brickellia) - Aster Family (Asteraceae)

Brickellia (Brickellbush) - Aster Family (Asteraceae)

Bristle Grass (Setaria) - Grass Family (Poaceae)

Brittlebush (Encelia) - Aster Family (Asteraceae)

Brome (Bromus) - Grass Family (Poaceae)

Bromus (Brome) - Grass Family (Poaceae)

Brookweed (Samolus) - Primrose Family (Primulaceae)

Broom-rape (Orobanche) - Broom Rape Family (Orobanchaceae)

Broom-rape Family (Orobanchaceae)

Buckthorn Family (Rhamnaceae)

Buckwheat Family (Polygonaceae)

Buffpetal (Rhynchosida) - Mallow Family (Malvaceae)

Bulrush (Schoenoplectus) - Sedge Family (Cyperaceae)

Bunchberry (Cornus) - Dogwood Family (Cornaceae)

Burr-ragweed (Ambrosia) - Aster Family (Asteraceae)

Bursera (Gumbo-limbo) - Frankincense Family (Burseraceae)

Burseraceae (Frankincense Family)

Bush-mint (Hyptis) - Mint Family (Lamiaceae)

Buttercup Family (Ranunculaceae)

Buttonbush (Cephalanthus) - Madder Family (Rubiaceae)


Cacao Family (Sterculiaceae)

Cactaceae (Cactus Family)

Cactus Family (Cactaceae)

Calandrinia (Redmaids) - Purselane Family (Portulacaceae)

Calibrachoa (Seaside-petunia) - Potato Family (Solanaceae)

California-mustard (Guillenia) - Mustard Family (Brassicaceae)

Calliandra (Stick-pea) - Pea Family (Fabaceae)

Calochortus (Mariposa-lily) - Lily Family (Liliaceae)

Calylophus (Sundrops) - Evening-primrose Family (Onagraceae)

Caltrop (Kallstroemia) - Creosote-bush Family (Zygophyllaceae)

Calycoseris (Tackstem) - Aster Family (Asteraceae)

Camissonia (Suncup) - Evening-primrose Family (Onagraceae)

Campanulaceae (Bellflower Family)

Camphorweed (Pluchea) - Aster Family (Asteraceae)

Canary Grass (Phalaris) - Grass Family (Poaceae)

Candyleaf (Stevia) - Aster Family (Asteraceae)

Canotia (Crucifixion-thorn) - Bittersweet Family (Celastraceae)

Caper Family (Capparaceae)

Capparaceae (Caper Family)

Carnegiea (Saguaro) - Cactus Family (Cactaceae)

Caprifoliaceae (Honeysuckle Family)

Carex (Sedge) - Sedge Family (Cyperaceae)

Carlowrightia (Wrightwort) - Acanthus Family (Acanthaceae)

Carpetweed (Mollugo) - Carpetweed Family (Molluginaceae)

Carpetweed Family (Molluginaceae)

Carrot Family (Apiaceae)

Caryophyllaceae (Pink Family)

Castela (Thorn-of-Christ) - Simarouba Family (Simaroubaceae)

Castilleja (Indian-paintbrush) - Figwort Family (Scrophulariaceae)

Catchbirdtree (Pisonia) - Four-o’clock Family (Nyctaginaceae)

Catchfly (Silene) - Pink Family (Caryophyllaceae)

Catclaw (Acacia) - Pea Family (Fabaceae)

Cathestecum (False Grama) - Grass Family (Poaceae)

Cat’s-eye (Cryptantha) - Borage Family (Boraginaceae)

Cat-tail (Typha) - Cat-tail Family (Typhaceae)

Cat-tail Family (Typhaceae)

Celastraceae (Bittersweet Family)

Celtis (Hackberry) - Elm Family (Ulmaceae)

Centaurium (Centaury) - Gentian Family (Gentianaceae)

Centaury (Centaurium) - Gentian Family (Gentianaceae)

Century Plant (Agave) - (Agave Family)

Century-plant Family (Agavaceae)

Cerastium (Mouse-ear Chickweed) - Pink Family (Caryophyllaceae)

Chaenactis (Pincushion) - Aster Family (Asteraceae)

Chamaesaracha (Five-eyes) - Potato Family (Solanaceae)

Chamaesyce (Sandmat) - Spurge Family (Euphorbiaceae)

Cheesebush (Hymenoclea) - Aster Family (Asteraceae)

Cheilanthes (Lip Fern) - Maidenhair Fern Family (Pteridaceae)

Chenopodiaceae (Goosefoot Family)

Chenopodium (Goosefoot) - Goosefoot Family (Chenopodiaceae)

Chilopsis (Desert-willow) - Trumpet-creeper Family (Bignoniaceae)

Chinese-lantern (Quincula) - Potato Family (Solanaceae)

Chloracantha (Mexican-devilweed) - Aster Family (Asteraceae)

Chloris (Windmill Grass) - Grass Family (Poaceae)

Cholla (Opuntia) - Cactus Family (Cactaceae)

Chorizanthe (Spineflower) - Buckwheat Family (Polygonaceae)

Christmas Mistletoe Family (Viscaceae)

Cinchweed (Pectis) - Aster Family (Asteraceae)

Cissus (Treebine) - Grape Family (Vitaceae)

Cirsium (Thistle) - Aster Family (Asteraceae)

Cistanthe (Pussypaws) - Purselane Family (Portulacaceae)

Clammyweed (Polanisia) - Caper Family (Capparaceae)

Claytonia (Springbeauty) - Purselane Family (Portulacaceae)

Clematis (Leather-flower, Virgin’s-bower) - Buttercup Family

Cliffbush (Jamesia) - Hydrangea Family (Hydrangeaceae)

Cliffbrake (Pellaea) - Maidenhair Fern Family (Pteridaceae)

Cliff Fern (Woodsia) - Wood Fern Family (Dryopteridaceae)

Clinopodium (Wild Basil) - Mint Family (Lamiaceae)

Cloak Fern (Notholaena) - Maidenhair Fern Family (Pteridaceae)

Clover (Trifolium) - Pea Family (Fabaceae)

Clusiaceae - St. John’s-wort Family

Cockroach Plant (Haplophyton) - Dogbane Family (Apocynacaeae)

Coralroot (Corallorrhiza) - Orchid Family (Orchidaceae)

Corallorrhiza (Coralroot) - Orchid Family (Orchidaceae)

Cologania (Cologania) - Pea Family (Fabaceae)

Cologania (Cologania) - Pea Family (Fabaceae)

Columbine (Aquilegia) - Buttercup Family (Ranunculaceae)

Combseed (Pectocarya) - Borage Family (Boraginaceae)

Comandra (Bastard-toadflax) - Sandalwood Family (Santalaceae)

Commelina (Dayflower) - Spiderwort Family (Commelinaceae)

Commelinaceae (Spiderwort Family)

Condalia (Snakewood) - Buckthorn Family (Rhamnaceae)

Copperleaf (Acalypha) - Spurge Family (Euphorbiaceae)

Coral-bean (Erythrina) - Pea Family (Fabaceae)

Cordylanthus (Bird’s-beak) - Figwort Family (Scrophulariaceae)

Cornaceae (Dogwood Family)

Cornus (Bunchberry, Dogwood) - Dogwood Family (Cornaceae)

Corydalis (Fumewort) - Fumitory Family (Fumariaceae)

Coryphantha (Beehive Cactus) - Cactus Family (Cactaceae)

Cotta Grass (Cottea) - Grass Family (Poaceae)

Cottea (Cotta Grass) - Grass Family (Poaceae)

Cotton (Gossypium) - Mallow Family (Malvaceae)

Cotton-rose (Filago) - Aster Family (Asteraceae)

Cotton-top Cactus (Echinocactus) - Cactus Family (Cactaceae)

Cottonwood (Populus) - Willow Family (Salicaceae)

Coursetia (Baby Bonnets) - Pea Family (Fabaceae)

Cow-parsnip (Heracleum) - Carrot Family (Apiaceae)

Crab Grass (Digitaria) - Grass Family (Poaceae)

Crane’s-bill (Geranium) - Geranium Family (Geraniaceae)

Crassula (Pygmyweed) - Stonecrop Family (Crassulaceae)

Crassulaceae (Stonecrop Family)

Creamcup (Platystemon) - Poppy Family (Papaveraceae)

Creosote-bush (Larrea) - Creosote-bush Family (Zygophyllaceae)

Creosote-bush Family (Zygophyllaceae)

Cricklemat (Tiquilia) - Borage Family (Boraginaceae)

Crossosoma (Rockflower) - Rockflower Family (Crossosomataceae)

Crossosomataceae (Rockflower Family)

Croton (Croton) - Spurge Family (Euphorbiaceae)

Croton (Croton) - Spurge Family (Euphorbiaceae)

Crownbeard (Verbesina) - Aster Family (Asteraceae)

Crown Grass (Paspalum) - Grass Family (Poaceae)

Crown-of-thorns (Koeberlinia) - Caper Family (Capparaceae)

Crucifixion-thorn (Canotia) - Bittersweet Family (Celastraceae)

Cryptantha (Cat’s-eye) - Borage Family (Boraginaceae)

Cucumber Family (Cucurbitaceae)

Cucurbita (Gourd, Pumpkin, Squash) - Cucumber Family (Cucurbitaceae)

Cucurbitaceae (Cucumber Family)

Cudweed (Gnaphalium) - Aster Family (Asteraceae)

Cudweed (Pseudognaphalium) - Aster Family (Asteraceae)

Cup Grass (Eriochloa) - Grass Family (Poaceae)

Cupressaceae (Cypress Family)

Curly-mesquite (Hilaria) - Grass Family (Poaceae)

Cuscuta (Dodder) - Dodder Family (Cuscutaceae)

Cuscutaceae (Dodder Family)

Cynanchum (Swallow-wort) - Milkweed Family (Asclepiadaceae)

Cyperaceae (Sedge Family)

Cyperus (Flat Sedge) - Sedge Family (Cyperaceae)

Cypress Family (Cupressaceae)


Dalea (Prairie-clover) - Pea Family (Fabaceae)

Dasylirion (Sotol) - Lily Family (Liliaceae)

Dasyochloa (Woollygrass) - Grass Family (Poaceae)

Datura (Jimsonweed, Thorn-apple) - Potato Family (Solanaceae)

Daucus (Queen Anne’s-lace) - Carrot Family (Apiaceae)

Dayflower (Commelina) - Spiderwort Family (Commelinaceae)

Delphinium (Larkspur) - Buttercup Family (Ranunculaceae)

Dennstaedtaceae (Bracken Fern Family)

Deschampsia (Hair Grass) - Grass Family (Poaceae)

Descurainia (Tansy-mustard) - Mustard Family (Brassicaceae)

Desert Christmas-tree (Pholisma) - Sandfood Family (Lennoaceae)

Desert-dandelion (Malacothrix) - Aster Family (Asteraceae)

Desert-honeysuckle (Anisacanthus) - Acanthus Family (Acanthaceae)

Desert-ironwood (Olneya) - Pea Family (Fabaceae)

Desert Marigold (Baileya) - Aster Family (Asteraceae)

Desert-peony (Acourtia) - Aster Family (Asteraceae)

Desertstar (Monoptilon) - Aster Family (Asteraceae)

Desert-thorn (Lycium) - Potato Family (Solanaceae)

Desert-trumpets (Linanthus) - Phlox Family (Polemoniaceae)

Desert-willow (Chilopsis) - Trumpet-creeper Family (Bignoniaceae)

Desmodium (Tick-trefoil) - Pea Family (Fabaceae)

Devil’s-claws (Pisonia) - Four-o’clock Family (Nyctaginaceae)

Dichelostemma (Snake-lily) - Lily Family (Liliaceae)

Dicliptera (Foldwing) - Acanthus Family (Acanthaceae)

Digitaria (Crab Grass) - Grass Family (Poaceae)

Distichlis (Salt Grass) - Grass Family (Poaceae)

Dock (Rumex) - Buckwheat Family (Polygonaceae)

Dodder (Cuscuta) - Dodder Family (Cuscutaceae)

Dodder Family (Cuscutaceae)

Dodecatheon (Shootingstar) - Primrose Family (Primulaceae)

Dodonaea (Hopbush) - Soapberry Family (Sapindaceae)

Dogbane Family (Apocynacaeae)

Dog’s-mouth (Pseudorontium) - Figwort Family (Scrophulariaceae)

Dogweed (Adenophyllum) - Aster Family (Asteraceae)

Dogwood (Cornus) - Dogwood Family (Cornaceae)

Dogwood Family (Cornaceae)

Dropseed (Sporobolus) - Grass Family (Poaceae)

Douglas-fir (Pseudotsuga) - Pine Family (Pinaceae)

Draba (Whitlow-grass) - Mustard Family (Brassicaceae)

Drymaria (Drymary) - Pink Family (Caryophyllaceae)

Drymary (Drymaria) - Pink Family (Caryophyllaceae)

Dryopetalon (Rock-mustard) - Mustard Family (Brassicaceae)

Dryopteridaceae (Wood Fern Family)

Dutchman’s-pipe (Aristolochia) - Birthwort Family (Aristolochiaceae)

Dwarf-mistletoe (Arceuthobium) - Christmas Mistletoe Family (Viscaceae)

Dwarf-morning-glory (Evolvulus) - Morning-glory Family (Convolvulaceae)


Easter-Bonnets (Antheropeas) - Aster Family (Asteraceae)

Echinocactus (Cotton-top Cactus) - Cactus Family (Cactaceae)

Echinocereus (Hedgehog Cactus) - Cactus Family (Cactaceae)

Echinopepon (Balsam Apple) - Cucumber Family (Cucurbitaceae)

Eclipta (False Daisy) - Aster Family (Asteraceae)

Elder (Sambucus) - Honeysuckle Family (Caprifoliaceae)

Elm Family (Ulmaceae)

Elymus (Bottle-brush Grass, Wild Rye) - Grass Family (Poaceae)

Encelia (Brittlebush) - Aster Family (Asteraceae)

Enneapogon (Feather Pappus Grass) - Grass Family (Poaceae)

Ephedra (Joint-fir, Mormon-tea) - Mormon-tea Family (Ephedraceae)

Ephedraceae (Mormon-tea Family)

Epilobium (Willowherb) - Evening-primrose Family (Onagraceae)

Equisetum (Horsetail and Scouring Rush) - Horsetail Family (Equisetaceae)

Eragrostis (Love Grass) - Grass Family (Poaceae)

Eremalche (White-mallow) - Mallow Family (Malvaceae)

Eriastrum (Woolstar) - Phlox Family (Polemoniaceae)

Ericaceae (Heath Family)

Ericameria (Heath Goldenrod) - Aster Family (Asteraceae)

Erigeron (Fleabane) - Aster Family (Asteraceae)

Eriochloa (Cup Grass) - Grass Family (Poaceae)

Eriogonum (Wild Buckwheat) - Buckwheat Family (Polygonaceae)

Erodium (Stork’s-bill) - Geranium Family (Geraniaceae)

Eryngium (Eryngo) - Carrot Family (Apiaceae)

Eryngo (Eryngium) - Carrot Family (Apiaceae)

Erythrina (Coral-bean) - Pea Family (Fabaceae)

Eschscholtzia (Golden-poppy) - Poppy Family (Papaveraceae)

Escobaria (Fox-tail Cactus) - Cactus Family (Cactaceae)

Eucrypta (Hideseed) - Waterleaf Family (Hydrophyllaceae)

Eupatorium (Boneset, Joe-pye-weed, Thoroughwort) - Aster Family (Asteraceae)

Euphorbia (Spurge) - Spurge Family (Euphorbiaceae)

Euphorbiaceae (Spurge Family)

Evax (Pygmy-cudweed) - Aster Family (Asteraceae)

Evening-primrose (Oenothera) - Evening-primrose Family (Onagraceae)

Evening-primrose Family (Onagraceae)

Evolvulus (Dwarf-morning-glory) - Morning-glory Family (Convolvulaceae)

Eysenhardtia (Kidneywood) - Pea Family (Fabaceae)


Fabaceae (Pea Family)

Fagaceae (Beech Family)

Fagonbush (Fagonia) - Creosote-bush Family (Zygophyllaceae)

Fagonia (Fagonbush) - Creosote-bush Family (Zygophyllaceae)

False Bluestem (Schizachyrium) - Grass Family (Poaceae)

False Cloak Fern (Argyrochosma) - Maidenhair Fern Family (Pteridaceae)

False Daisy (Eclipta) - Aster Family (Asteraceae)

False Golden-aster (Heterotheca) - Aster Family (Asteraceae)

False Goldfields (Bahia) - Aster Family (Asteraceae)

False Grama (Cathestecum) - Grass Family (Poaceae)

False Hedge-parsley (Yabea) - Carrot Family (Apiaceae)

False Mallow (Malvastrum) - Mallow Family (Malvaceae)

False Mountain-parsley (Pseudocymopterus) - Carrot Family (Apiaceae)

False Oat (Trisetum) - Grass Family (Poaceae)

False Pennyroyal (Hedeoma) - Mint Family (Lamiaceae)

False Prairie-clover (Marina) - Pea Family (Fabaceae)

False Sensitive-plant (Mimosa) - Pea Family (Fabaceae)

False Solomon’s-seal (Maianthemum) - Lily Family (Liliaceae)

False Willow (Baccharis) - Aster Family (Asteraceae)

Fallugia (Apache-plume) - Rose Family (Rosaceae)

Fanpetals (Sida) - Mallow Family (Malvaceae)

Feather Pappus Grass (Enneapogon) - Grass Family (Poaceae)

Fendlera (Fendlerbush) - Hydrangea Family (Hydrangeaceae)

Fendlerbush (Fendlera) - Hydrangea Family (Hydrangeaceae)

Ferocactus (Barrel Cactus) - Cactus Family (Cactaceae)

Fescue (Festuca) - Grass Family (Poaceae)

Festuca (Fescue) - Grass Family (Poaceae)

Feverfew (Parthenium) - Aster Family (Asteraceae)

Fiddleleaf (Nama) - Waterleaf Family (Hydrophyllaceae)

Fiddleneck (Amsinckia) - Borage Family (Boraginaceae)

Fiesta-flower (Pholistoma) - Waterleaf Family (Hydrophyllaceae)

Fig-marigold Family (Aizoaceae)

Figwort Family (Scrophulariaceae)

Filago (Cotton-rose) - Aster Family (Asteraceae)

Fir (Abies) - Pine Family (Pinaceae)

Fish-hook Cactus (Sclerocactus) - Cactus Family (Cactaceae)

Five-eyes (Chamaesaracha) - Potato Family (Solanaceae)

Flameflower (Talinum) - Purselane Family (Portulacaceae)

Flat Sedge (Cyperus) - Sedge Family (Cyperaceae)

Flax (Linum) - Flax Family (Linaceae)

Flax Family (Linaceae)

Fleabane (Erigeron) - Aster Family (Asteraceae)

Fluff Grass (Tridens) - Grass Family (Poaceae)

Foldwing (Dicliptera) - Acanthus Family (Acanthaceae)

Forestiera (Swamp-privet) - Olive Family (Oleaceae)

Fouquieria (Ocotillo) - Ocotillo Family (Fouquieriaceae)

Fouquieriaceae (Ocotillo Family)

Four-o’clock (Mirabilis) - Four-o’clock Family (Nyctaginaceae)

Four-o’clock Family (Nyctaginaceae)

Fox-tail Cactus (Escobaria) - Cactus Family (Cactaceae)

Fragaria (Strawberry) - Rose Family (Rosaceae)

Frankincense Family (Burseraceae)

Fraxinus (Ash) - Olive Family (Oleaceae)

Fringed Orchid (Platanthera) - Orchid Family (Orchidaceae)

Fringele (Platanthera) - Orchid Family (Orchidaceae)

Fringpod (Thysanocarpus) - Mustard Family (Brassicaceae)

Fumariaceae (Fumitory Family)

Fumewort (Corydalis) - Fumitory Family (Fumariaceae)

Fumitory Family (Fumariaceae)

Funastrum (Twinevine) - Milkweed Family (Asclepiadaceae)


Gaillardia (Blanket-flower) - Aster Family (Asteraceae)

Galactia (Milk-pea) - Pea Family (Fabaceae)

Gallant-soldier (Galinsoga) - Aster Family (Asteraceae)

Galinsoga (Gallant-soldier) - Aster Family (Asteraceae)

Galium (Bedstraw) - Madder Family (Rubiaceae)

Galleta (Hilaria) - Grass Family (Poaceae)

Garlic (Allium) - Lily Family (Liliaceae)

Garrya (Silktassel) - Silktassel Family (Garryaceae)

Garryaceae (Silktassel Family)

Gaura (Beeblossum) - Evening-primrose Family (Onagraceae)

Gentian Family (Gentianaceae)

Gentianaceae (Gentian Family)

Geraniaceae (Geranium Family)

Geranium (Crane’s-bill) - Geranium Family (Geraniaceae)

Geranium Family (Geraniaceae)

Germander (Teucrium) - Mint Family (Lamiaceae)

Gilia (Gily-flower) - Phlox Family (Polemoniaceae)

Gily-flower (Gilia) - Phlox Family (Polemoniaceae)

Glandularia (Mock Vervain) - Verbena Family (Verbenaceae)

Globe-mallow (Sphaeralcea) - Mallow Family (Malvaceae)

Glyceria (Manna Grass) - Grass Family (Poaceae)

Gnaphalium (Cudweed) - Aster Family (Asteraceae)

Goat-chicory (Agoseris) - Aster Family (Asteraceae)

Goldback Fern (Pentagramma) - Maidenhair Fern Family (Pteridaceae)

Goldeneye (Viguiera) - Aster Family (Asteraceae)

Golden-poppy (Eschscholtzia) - Poppy Family (Papaveraceae)

Goldenrod (Solidago) - Aster Family (Asteraceae)

Goldfields (Lasthenia) - Aster Family (Asteraceae)

Goosefoot (Chenopodium) - Goosefoot Family (Chenopodiaceae)

Goosefoot Family (Chenopodiaceae)

Gossypium (Cotton) - Mallow Family (Malvaceae)

Gourd (Cucurbita) - Cucumber Family (Cucurbitaceae)

Grama (Bouteloua) - Grass Family (Poaceae)

Grape (Vitis) - Grape Family (Vitaceae)

Grape Family (Vitaceae)

Grappling-hook (Harpagonella) - Borage Family (Boraginaceae)

Grass Family (Poaceae)

Grasswort (Lilaeopsis) - Carrot Family (Apiaceae)

Gromwell (Lithospermum) - Borage Family (Boraginaceae)

Grooveburr (Agrimonia) - Rose Family (Rosaceae)

Ground-cherry (Physalis) - Potato Family (Solanaceae)

Guillenia (California-mustard) - Mustard Family (Brassicaceae)

Gumbo-limbo (Bursera) - Frankincense Family (Burseraceae)

Gumhead (Gymnosperma) - Aster Family (Asteraceae)

Gutierrezia (Snakeweed) - Aster Family (Asteraceae)

Gymnosperma (Gumhead) - Aster Family (Asteraceae)


Hackberry (Celtis) - Elm Family (Ulmaceae)

Hair Grass (Deschampsia) - Grass Family (Poaceae)

Haloragaceae (Water-milfoil Family)

Haplophyton (Cockroach Plant) - Dogbane Family (Apocynacaeae)

Harpagonella (Grappling-hook) - Borage Family (Boraginaceae)

Hawkweed (Hieracium) - Aster Family (Asteraceae)

Heath Family (Ericaceae)

Heath Goldenrod (Ericameria) - Aster Family (Asteraceae)

Hedeoma (False Pennyroyal) - Mint Family (Lamiaceae)

Hedgehog Cactus (Echinocereus) - Cactus Family (Cactaceae)

Hedge-nettle (Stachys) - Mint Family (Lamiaceae)

Helenium (Sneezeweed) - Aster Family (Asteraceae)

Heracleum (Cow-parsnip) - Carrot Family (Apiaceae)

Herissantia (Bladder-mallow) - Mallow Family (Malvaceae)

Herniaria (Rupturewort) - Pink Family (Caryophyllaceae)

Heteropogon (Tanglehead) - Grass Family (Poaceae)

Heterosperma (Wingpetal) - Aster Family (Asteraceae)

Heterotheca (False Golden-aster) - Aster Family (Asteraceae)

Heuchera (Alumroot) - Saxifrage Family (Saxifragaceae)

Hibiscus (Rose-mallow) - Mallow Family (Malvaceae)

Hideseed (Eucrypta) - Waterleaf Family (Hydrophyllaceae)

Hieracium (Hawkweed) - Aster Family (Asteraceae)

Hilaria (Curly-mesquite, Galleta) - Grass Family (Poaceae)

Hoffmanseggia (Rush-pea) - Pea Family (Fabaceae)

Holodiscus (Oceanspray) - Rose Family (Rosaceae)

Honeysuckle (Lonicera) - Honeysuckle Family (Caprifoliaceae)

Honeysuckle Family (Caprifoliaceae)

Honeysweet (Tidestromia) - Amaranth Family (Amaranthaceae)

Hopbush (Dodonaea) - Soapberry Family (Sapindaceae)

Hordeum (Barley) - Grass Family (Poaceae)

Horned-pondweed (Zannichellia) - Horned-pondweed Family (Zannichelliaceae)

Horned-pondweed Family (Zannichelliaceae)

Horse-nettle (Solanum) - Potato Family (Solanaceae)

Horse-purslane (Trianthema) Fig-marigold Family (Aizoaceae)

Horsetail (Equisetum) - Horsetail Family (Equisetaceae)

Houstonia (Bluet) - Madder Family (Rubiaceae)

Hydrangea Family - Hydrangeaceae

Hydrangeaceae - Hydrangea Family

Hydrocotyle (Marsh Pennywort) - Carrot Family (Apiaceae)  

Hydrophyllaceae (Waterleaf Family)

Hymenoclea (Cheesebush) - Aster Family (Asteraceae)

Hymenopappus (Woollywhite) - Aster Family (Asteraceae)

Hymenothrix (Thimblehead) - Aster Family (Asteraceae)

Hymenoxys (Rubberweed) - Aster Family (Asteraceae)

Hypericum (St. John’s-wort) - St. John’s-wort Family (Clusiaceae)


Indian-mallow (Abutilon) - Mallow Family (Malvaceae)

Indian-paintbrush (Castilleja) - Figwort Family (Scrophulariaceae)

Indigo-bush (Amorpha) - Pea Family (Fabaceae)

Ipomoea (Morning-glory) - Morning-glory Family (Convolvulaceae)

Ipomopsis (Skyrocket) - Phlox Family (Polemoniaceae)

Iresine (Bloodleaf) - Amaranth Family (Amaranthaceae)

Iridaceae (Iris Family)

Iris Family (Iridaceae)

Isocoma (Jimmyweed) - Aster Family (Asteraceae)

Iva (Marsh-elder) - Aster Family (Asteraceae)


Jamesia (Cliffbush) - Hydrangea Family (Hydrangeaceae)

Janusia (Janusia) - Barbados-cherry Family (Malpighiaceae)

Janusia (Janusia) - Barbados-cherry Family (Malpighiaceae)

Jatropha (Nettle Spurge) - Spurge Family (Euphorbiaceae)

Jewelflower (Streptanthus) - Mustard Family (Brassicaceae)

Jimmyweed (Isocoma) - Aster Family (Asteraceae)

Jimsonweed (Datura) - Potato Family (Solanaceae)

Joe-pye-weed (Eupatorium) - Aster Family (Asteraceae)

Joint-fir (Ephedra) - Mormon-tea Family (Ephedraceae)

Jojoba (Simmondsia) - Jojoba Family (Simmondsiaceae)

Jojoba Family (Simmondsiaceae)

Juglandaceae (Walnut Family)

Juglans (Walnut) - Walnut Family (Juglandaceae)

Jujube (Ziziphus) - Buckthorn Family (Rhamnaceae)

Juncaceae - Rush Family

Juncus (Rush) - Rush Family (Juncaceae)

Juniper (Juniperus) - Cypress Family (Cupressaceae)

Juniperus (Juniper) - Cypress Family (Cupressaceae)

Justicia (Water-willow) - Acanthus Family (Acanthaceae)


Kallstroemia (Caltrop) - Creosote-bush Family (Zygophyllaceae)

Kidneywood (Eysenhardtia) - Pea Family (Fabaceae)

Koeberlinia (Crown-of-thorns) - Caper Family (Capparaceae)

Koeler’s Grass (Koeleria)- Grass Family (Poaceae)

Koeleria (Koeler’s Grass)- Grass Family (Poaceae)

Krameria (Ratany) - Ratany Family (Krameriaceae)

Krameriaceae (Ratany Family)


Ladies-tresses (Spiranthes) - Orchid Family (Orchidaceae)

Lady Fern (Athyrium) - Wood Fern Family (Dryopteridaceae)

Laennecia (Marshtail) - Aster Family (Asteraceae)

Lamiaceae (Mint Family)

Lappula (Sheepburr) - Borage Family (Boraginaceae)

Larkspur (Delphinium) - Buttercup Family (Ranunculaceae)

Larrea (Creosote-bush) - Creosote-bush Family (Zygophyllaceae)

Lasthenia (Goldfields) - Aster Family (Asteraceae)

Lathyrus (Sweet-pea, Vetchling) - Pea Family (Fabaceae)

Leadwort (Plumbago) - Leadwort Family (Plumbaginaceae)

Leadwort Family (Plumbaginaceae)

Leather-flower (Clematis) - Buttercup Family

Lennoaceae (Sandfood Family)

Lepidium (Pepperwort) - Mustard Family (Brassicaceae)

Leptochloa (Sprangletop) - Grass Family (Poaceae)

Lesquerella (Bladderpod) - Mustard Family (Brassicaceae)

Leymus (Lyme Grass) - Grass Family (Poaceae)

Lilaeopsis (Grasswort) - Carrot Family (Apiaceae)

Liliaceae (Lily Family)

Lily Family (Liliaceae)

Linaceae (Flax Family)

Linanthus (Desert-trumpets) - Phlox Family (Polemoniaceae)

Linum (Flax) - Flax Family (Linaceae)

Lip Fern (Cheilanthes) - Maidenhair Fern Family (Pteridaceae)

Lipsticktree Family (Bixaceae)

Listera (Twayblade) - Orchid Family (Orchidaceae)

Lithospermum (Gromwell) - Borage Family (Boraginaceae)

Liverseed Grass (Urochloa) - Grass Family (Poaceae)

Loasaceae (Blazingstar Family)

Lobelia (Lobelia) - Bellflower Family (Campanulaceae)

Lobelia (Lobelia) - Bellflower Family (Campanulaceae)

Locoweed (Oxytropis) - Pea Family (Fabaceae)

Locust (Robinia) - Pea Family (Fabaceae)

Loeflingia (Pygmyleaf) - Pink Family (Caryophyllaceae)

Lonicera (Honeysuckle) - Honeysuckle Family (Caprifoliaceae)

Loosestrife (Lythrum)

Lotus (Bird’s-foot-trefoil) - Pea Family (Fabaceae)

Love Grass (Eragrostis) - Grass Family (Poaceae)

Lupinus (Bluebonnet, Lupine) - Pea Family (Fabaceae)

Luzula (Wood-rush) - Rush Family (Juncaceae)

Lycium (Desert-thorn, Matrimony-vine) - Potato Family (Solanaceae)

Lycurus (Wolf’s-tail) - Grass Family (Poaceae)

Lyme Grass (Leymus) - Grass Family (Poaceae)

Lythraceae (Loosestrife Family)

Lythrum (Loosestrife)


Machaeranthera (Tansy-aster) - Aster Family (Asteraceae)

Madder Family (Rubiaceae)

Madrone (Arbutus) - Heath Family (Ericaceae)

Mahonia (Oregon-grape) - Barberry Family (Berberidaceae)

Maianthemum (False Solomon’s-seal) - Lily Family (Liliaceae)

Maidenhair (Adiantum) - Maidenhair Fern Family (Pteridaceae)

Maidenhair Fern Family (Pteridaceae)

Malacothrix (Desert-dandelion) - Aster Family (Asteraceae)

Malaxis (Adder’s-mouth Orchid) - Orchid Family (Orchidaceae)

Mallow Family (Malvaceae)

Malpighiaceae (Barbados-cherry Family)

Malvaceae (Mallow Family)

Malvastrum (False Mallow) - Mallow Family (Malvaceae)

Malvella (Scurfy-mallow) - Mallow Family (Malvaceae)

Mammillaria (Nipple Cactus) - Cactus Family (Cactaceae)

Manihot (Manihot) - Spurge Family (Euphorbiaceae)

Manihot (Manihot) - Spurge Family (Euphorbiaceae)

Manna Grass (Glyceria) - Grass Family (Poaceae)

Manroot (Marah) - Cucumber Family (Cucurbitaceae)

Manzanita (Arctostaphylos) - Heath Family (Ericaceae)

Maple (Acer) - Maple Family (Aceraceae)

Maple Family (Aceraceae)

Marah (Manroot) - Cucumber Family (Cucurbitaceae)

Marina (False Prairie-clover) - Pea Family (Fabaceae)

Mariposa-lily (Calochortus) - Lily Family (Liliaceae)

Marsh-elder (Iva) - Aster Family (Asteraceae)

Marsh Pennywort (Hydrocotyle) - Carrot Family (Apiaceae)  

Marshtail (Laennecia) - Aster Family (Asteraceae)

Matelea (Milkvine) - Milkweed Family (Asclepiadaceae)

Matricaria (Mayweed) - Aster Family (Asteraceae)

Matrimony-vine (Lycium) - Potato Family (Solanaceae)

Maurandella (Roving-sailor) - Figwort Family (Scrophulariaceae)

Mayweed (Matricaria) - Aster Family (Asteraceae)

Meadow-rue (Thalictrum) - Buttercup Family (Ranunculaceae)

Melampodium (Blackfoot) - Aster Family (Asteraceae)

Melon-loco (Apodanthera) - Cucumber Family (Cucurbitaceae)

Menodora (Menodora) - Olive Family (Oleaceae)

Menodora (Menodora) - Olive Family (Oleaceae)

Mentzelia (Blazingstar) - Blazingstar Family (Loasaceae)

Mesquite (Prosopis) - Pea Family (Fabaceae)

Mexican-devilweed (Chloracantha) - Aster Family (Asteraceae)

Mignonette Family (Resedaceae)

Milk-pea (Galactia) - Pea Family (Fabaceae)

Milktree (Sebastiania) - Spurge Family (Euphorbiaceae)

Milkvine (Matelea) - Milkweed Family (Asclepiadaceae)

Milk-vetch (Astragalus) - Pea Family (Fabaceae)

Milkweed (Asclepias) - Milkweed Family (Asclepiadaceae)

Milkweed Family (Asclepiadaceae)

Milkwort (Polygala) - Milkwort Family (Polygalaceae)

Milkwort Family (Polygalaceae)

Mimosa (Mimosa) - Pea Family (Fabaceae)

Mimosa (False Sensitive-plant, Mimosa) - Pea Family (Fabaceae)

Mimulus (Monkey-flower) - Figwort Family (Scrophulariaceae)

Mint Family (Lamiaceae)

Mirabilis (Four-o’clock) - Four-o’clock Family (Nyctaginaceae)

Mistletoe (Phoradendron) - Christmas Mistletoe Family (Viscaceae)

Mock Vervain (Glandularia) - Verbena Family (Verbenaceae)

Molluginaceae (Carpetweed Family)

Mollugo (Carpetweed) - Carpetweed Family (Molluginaceae)

Monardella (Mountainbalm) - Mint Family (Lamiaceae)

Monkey-flower (Mimulus) - Figwort Family (Scrophulariaceae)

Monolepis (Poverty-weed) - Goosefoot Family (Chenopodiaceae)

Monoptilon (Desertstar) - Aster Family (Asteraceae)

Monsterwort (Parthenice) - Aster Family (Asteraceae)

Mormon-tea (Ephedra) - Mormon-tea Family (Ephedraceae)

Mormon-tea Family (Ephedraceae)

Morning-glory (Ipomoea) - Morning-glory Family (Convolvulaceae)

Morning-glory Family (Convolvulaceae)

Morus (Mullberry) - Mulberry Family (Moraceae)

Moraceae (Mulberry Family)

Mortonia (Saddlebush) - Bittersweet Family (Celastraceae)

Mountainbalm (Monardella) - Mint Family (Lamiaceae)

Mouse-ear Chickweed (Cerastium) - Pink Family (Caryophyllaceae)

Mousetail (Myosurus) - Buttercup Family (Ranunculaceae)

Muhlenbergia (Muhly) - Grass Family (Poaceae)

Muhly (Muhlenbergia) - Grass Family (Poaceae)

Mullberry (Morus) - Mulberry Family (Moraceae)

Mulberry Family (Moraceae)

Mustard Family (Brassicaceae)

Myosurus (Mousetail) - Buttercup Family (Ranunculaceae)

Myriophyllum (Water-milfoil) - Water-milfoil Family (Haloragaceae)

Myrtle-croton (Bernardia) - Spurge Family (Euphorbiaceae)


Najadaceae (Waternymph Family)

Najas (Waternymph) - Waternymph Family (Najadaceae)

Nama (Fiddleleaf) - Waterleaf Family (Hydrophyllaceae)

Needle Grass (Achnatherum) - Grass Family (Poaceae)

Nemacladus (Threadplant) - Bellflower Family (Campanulaceae)

Neogaerrhinum (Twining-snapdragon) - Figwort Family (Scrophulariaceae)

Neststraw (Stylocline) - Aster Family (Asteraceae)

Nettle Family (Urticaceae)

Nettle Spurge (Jatropha) - Spurge Family (Euphorbiaceae)

Nicotiana (Tobacco) - Potato Family (Solanaceae)

Night-blooming-cereus (Peniocereus) - Cactus Family (Cactaceae)

Nightshade (Solanum) - Potato Family (Solanaceae)

Nipple Cactus (Mammillaria) - Cactus Family (Cactaceae)

Nissolia (Yellowhood) - Pea Family (Fabaceae)

Nolina (Bear Grass) - Lily Family (Liliaceae)

Noseburn (Tragia) - Spurge Family (Euphorbiaceae)

Notholaena (Cloak Fern) - Maidenhair Fern Family (Pteridaceae)

Nuttallanthus (Toadflax) - Figwort Family (Scrophulariaceae)

Nyctaginaceae (Four-o’clock Family)


Oak (Quercus) - Beech Family (Fagaceae)

Oceanspray (Holodiscus) - Rose Family (Rosaceae)

Ocotillo (Fouquieria) - Ocotillo Family (Fouquieriaceae)

Ocotillo Family (Fouquieriaceae)

Oenothera (Evening-primrose) - Evening-primrose Family (Onagraceae)

Oleaceae (Olive Family)

Oligomeris (Whitepuff) - Mignonette Family (Resedaceae)

Olive Family (Oleaceae)

Olneya (Desert-ironwood) - Pea Family (Fabaceae)

Onagraceae (Evening-primrose Family)

Onion (Allium) - Lily Family (Liliaceae)

Opuntia (Cholla, Prickly-pear) - Cactus Family (Cactaceae)

Orache (Atriplex) - Goosefoot Family (Chenopodiaceae)

Orchid Family (Orchidaceae)

Orchidaceae (Orchid Family)

Oregon-grape (Mahonia) - Barberry Family (Berberidaceae)

Organ-pipe Cactus (Stenocereus) - Cactus Family (Cactaceae)

Orobanchaceae (Broom-rape Family)

Orobanche (Broom-rape) - Broom Rape Family (Orobanchaceae)

Osmorhiza (Sweet-cicely) - Carrot Family (Apiaceae)

Oxytropis (Locoweed) - Pea Family (Fabaceae)


Pachycereus (Senita) - Cactus Family (Cactaceae)

Packera (Packera) - Aster Family (Asteraceae)

Packera (Packera) - Aster Family (Asteraceae)

Palo-verde (Parkinsonia) - Pea Family (Fabaceae)

Panic Grass (Panicum) - Grass Family (Poaceae)

Panicum (Panic Grass) - Grass Family (Poaceae)

Papaveraceae (Poppy Family)

Paper-Flower (Psilostrophe) - Aster Family (Asteraceae)

Pappophorum (Pappus Grass) - Grass Family (Poaceae)

Pappus Grass (Pappophorum) - Grass Family (Poaceae)

Parietaria (Pellitory) - Nettle Family (Urticaceae)

Parkinsonia (Palo-verde) - Pea Family (Fabaceae)

Parthenice (Monsterwort) - Aster Family (Asteraceae)

Parthenium (Feverfew) - Aster Family (Asteraceae)

Parthenocissus (Virginia-creeper) - Grape Family (Vitaceae)

Paspalum (Crown Grass) - Grass Family (Poaceae)

Pea Family (Fabaceae)

Peaseed (Sphinctospermum) - Pea Family (Fabaceae)

Pectis (Cinchweed) - Aster Family (Asteraceae)

Pectocarya (Combseed) - Borage Family (Boraginaceae)

Pedaliaceae (Sesame Family)

Pellaea (Cliffbrake) - Maidenhair Fern Family (Pteridaceae)

Pellitory (Parietaria) - Nettle Family (Urticaceae)

Peniocereus (Night-blooming-cereus) - Cactus Family (Cactaceae)

Penstemon (Beardtongue) - Figwort Family (Scrophulariaceae)

Pentagramma (Goldback Fern) - Maidenhair Fern Family (Pteridaceae)

Pepperwort (Lepidium) - Mustard Family (Brassicaceae)

Perityle (Rockdaisy) - Aster Family (Asteraceae)

Phacelia (Scorpionweed) Waterleaf Family (Hydrophyllaceae)

Phalaris (Canary Grass) - Grass Family (Poaceae)

Phaseolus (Bean) - Pea Family (Fabaceae)

Phlox (Phlox) - Phlox Family (Polemoniaceae)

Phlox (Phlox) - Phlox Family (Polemoniaceae)

Phlox Family (Polemoniaceae)

Pholisma (Desert Christmas-tree, Sandfood) - Sandfood Family (Lennoaceae)

Pholistoma (Fiesta-flower) - Waterleaf Family (Hydrophyllaceae)

Phoradendron (Mistletoe) - Christmas Mistletoe Family (Viscaceae)

Phragmites (Reed) - Grass Family (Poaceae)

Physalis (Ground-cherry) - Potato Family (Solanaceae)

Phytolaccaceae (Pokeweed Family)

Picea (Spruce) - Pine Family (Pinaceae)

Pincushion (Chaenactis) - Aster Family (Asteraceae)

Pine (Pinus) - Pine Family (Pinaceae)

Pine Family (Pineaceae)

Pineaceae (Pine Family)

Pink Family (Caryophyllaceae)

Pinus (Pine) - Pine Family (Pinaceae)

Piptochaetium (Spear Grass) - Grass Family (Poaceae)

Pisonia (Catchbirdtree, Devil’s-claws) - Four-o’clock Family (Nyctaginaceae)

Plagiobothrys (Popcorn-flower) - Borage Family (Boraginaceae)

Planetree (Platanus) - Planetree Family (Platanaceae)

Planetree Family (Platanaceae)

Plantago (Plantain) - Plantain Family (Plantaginaceae)

Plantaginaceae (Plantain Family)

Plantain (Plantago) - Plantain Family (Plantaginaceae)

Plantain Family (Plantaginaceae)

Platanaceae (Planetree Family)

Platanthera (Bog Orchid, Fringed Orchid, Fringele) - Orchid Family (Orchidaceae)

Platanus (Planetree, Sycamore) - Planetree Family (Platanaceae)

Platystemon (Creamcup) - Poppy Family (Papaveraceae)

Pleuraphis (Tobosagrass) - Grass Family (Poaceae)

Pluchea (Camphorweed) - Aster Family (Asteraceae)

Plumbaginaceae (Leadwort Family)

Plumbago (Leadwort) - Leadwort Family (Plumbaginaceae)

Plumseed (Rafinesquia) - Aster Family (Asteraceae)

Poa (Blue Grass) - Grass Family (Poaceae)

Poaceae (Grass Family)

Poison-ivy (Toxicodendron) - Sumac Family (Anacardiaceae)

Poison-oak (Toxicodendron) - Sumac Family (Anacardiaceae)

Poison-sumac (Toxicodendron) - Sumac Family (Anacardiaceae)

Pokeweed Family (Phytolaccaceae)

Polanisia (Clammyweed) - Caper Family (Capparaceae)

Polemoniaceae (Phlox Family)

Polygala (Milkwort) - Milkwort Family (Polygalaceae)

Polygalaceae (Milkwort Family)

Polygonaceae (Buckwheat Family)

Pondweed (Potamogeton) - Pondweed Family (Potamogetonaceae)

Pondweed Family (Potamogetonaceae)

Popcorn-flower (Plagiobothrys) - Borage Family (Boraginaceae)

Poplar (Populus) - Willow Family (Salicaceae)

Poppy Family (Papaveraceae)

Populus (Cottonwood, Poplar) - Willow Family (Salicaceae)

Poreleaf (Porophyllum) - Aster Family (Asteraceae)

Porophyllum (Poreleaf) - Aster Family (Asteraceae)

Portulaca (Purselane) - Purselane Family (Portulacaceae)

Portulacaceae (Purselane Family)

Potamogeton (Pondweed) - Pondweed Family (Potamogetonaceae)

Potamogetonaceae (Pondweed Family)

Potato Family (Solanaceae)

Poverty-weed (Monolepis) - Goosefoot Family (Chenopodiaceae)

Prairie-aster (Symphyotrichum) - Aster Family (Asteraceae)

Prairie-clover (Dalea) - Pea Family (Fabaceae)

Pricklyleaf (Thymophylla) - Aster Family (Asteraceae)

Prickly-pear (Opuntia) - Cactus Family (Cactaceae)

Prickly-poppy (Argemone) - Poppy Family (Papaveraceae)

Primrose (Primula) - Primrose Family (Primulaceae)

Primrose Family (Primulaceae)

Primula (Primrose) - Primrose Family (Primulaceae)

Primulaceae (Primrose Family)

Proboscidea (Unicorn-plant) - Sesame Family (Pedaliaceae)

Prosopis (Mesquite, Screw-bean) - Pea Family (Fabaceae)

Prunella (Selfheal) - Mint Family (Lamiaceae)

Pseudorontium (Dog’s-mouth) - Figwort Family (Scrophulariaceae)

Pseudocymopterus (False Mountain-parsley) - Carrot Family (Apiaceae)

Pseudognaphalium (Pseudognaphalium) - Aster Family (Asteraceae)

Pseudognaphalium (Pseudognaphalium) - Aster Family (Asteraceae)

Pseudotsuga (Douglas-fir) - Pine Family (Pinaceae)

Psilactis (Psilactis) - Aster Family (Asteraceae)

Psilactis (Psilactis) - Aster Family (Asteraceae)

Psilostrophe (Paper-Flower) - Aster Family (Asteraceae)

Pteridium (Bracken Fern) - Bracken Fern Family (Dennstaedtaceae)

Pteridaceae (Maidenhair Fern Family)

Pterostegia (Threadstem) - Buckwheat Family (Polygonaceae)

Pumpkin (Cucurbita) - Cucumber Family (Cucurbitaceae)

Purselane (Portulaca) - Purselane Family (Portulacaceae)

Purselane Family (Portulacaceae)

Pussypaws (Cistanthe) - Purselane Family (Portulacaceae)

Pussytoes (Antennaria) - Aster Family (Asteraceae)

Pygmy-cudweed (Evax) - Aster Family (Asteraceae)

Pygmyleaf (Loeflingia) - Pink Family (Caryophyllaceae)

Pygmyweed (Crassula) - Stonecrop Family (Crassulaceae)


Queen Anne’s-lace (Daucus) - Carrot Family (Apiaceae)

Quercus (Oak) - Beech Family (Fagaceae)

Quincula (Chinese-lantern) - Potato Family (Solanaceae)


Rafinesquia (Plumseed) - Aster Family (Asteraceae)

Ragweed (Ambrosia) - Aster Family (Asteraceae)

Ragwort (Senecio) - Aster Family (Asteraceae)

Raichie (Waltheria) - Cacao Family (Sterculiaceae)

Ratany (Krameria) - Ratany Family (Krameriaceae)

Ratany Family (Krameriaceae)

Redmaids (Calandrinia) - Purselane Family (Portulacaceae)

Reed (Phragmites) - Grass Family (Poaceae)

Resedaceae (Mignonette Family)

Rhamnaceae (Buckthorn Family)

Rhus (Sumac) - Sumac Family (Anacardiaceae)

Rhynchosida (Buffpetal) - Mallow Family (Malvaceae)

Rivina (Rougeplant) - Pokeweed Family (Phytolaccaceae)

Robinia (Locust) - Pea Family (Fabaceae)

Rockcress (Arabis) - Mustard Family (Brassicaceae)

Rockdaisy (Perityle) - Aster Family (Asteraceae)

Rockflower (Crossosoma) - Rockflower Family (Crossosomataceae)

Rockflower Family (Crossosomataceae)

Rock-jasmine (Androsace) - Primrose Family (Primulaceae)

Rock-mustard (Dryopetalon) - Mustard Family (Brassicaceae)

Rosaceae (Rose Family)

Rose Family (Rosaceae)

Rose-mallow (Hibiscus) - Mallow Family (Malvaceae)

Rougeplant (Rivina) - Pokeweed Family (Phytolaccaceae)

Roving-sailor (Maurandella) - Figwort Family (Scrophulariaceae)

Rubberweed (Hymenoxys) - Aster Family (Asteraceae)

Rubiaceae (Madder Family)

Rue Family (Rutaceae)

Ruellia (Wild Petunia) - Acanthus Family (Acanthaceae)

Rumex (Sorrel) - Buckwheat Family (Polygonaceae)

Rutaceae (Rue Family)

Rumex (Dock) - Buckwheat Family (Polygonaceae)

Rupturewort (Herniaria) - Pink Family (Caryophyllaceae)

Rush (Juncus) - Rush Family (Juncaceae)

Rush Family - Juncaceae

Rush-pea (Hoffmanseggia) - Pea Family (Fabaceae)


Saddlebush (Mortonia) - Bittersweet Family (Celastraceae)

Sage (Salvia) - Mint Family (Lamiaceae)

Sagebrush (Artemisia) - Aster Family (Asteraceae)

Saguaro (Carnegiea) - Cactus Family (Cactaceae)

Sairocarpus (Toad’s-mouth) - Figwort Family (Scrophulariaceae)

Salicaceae (Willow Family)

Salix (Willow) - Willow Family (Salicaceae)

Saltbush (Atriplex) - Goosefoot Family (Chenopodiaceae)

Salt Grass (Distichlis) - Grass Family (Poaceae)

Salvia (Sage) - Mint Family (Lamiaceae)

Sambucus (Elder) - Honeysuckle Family (Caprifoliaceae)

Samolus (Brookweed) - Primrose Family (Primulaceae)

Sandalwood Family (Santalaceae)

Sandfood (Pholisma) - Sandfood Family (Lennoaceae)

Sandfood Family (Lennoaceae)

Sandmat (Chamaesyce) - Spurge Family (Euphorbiaceae)

Sandwort (Arenaria) - Pink Family (Caryophyllaceae)

Santalaceae (Sandalwood Family)

Sapindaceae (Soapberry Family)

Sapindus (Soapberry) - Soapberry Family (Sapindaceae)

Saxifragaceae (Saxifrage Family)

Saxifraga (Saxifrage) - Saxifrage Family (Saxifragaceae)

Saxifrage (Saxifraga) - Saxifrage Family (Saxifragaceae)

Saxifrage Family (Saxifragaceae)

Scaleseed (Spermolepis) - Carrot Family (Apiaceae)

Scaly Cloak Fern (Astrolepis) - Maidenhair Fern Family (Pteridaceae)

Schizachyrium (False Bluestem) - Grass Family (Poaceae)

Schoenoplectus (Bulrush) - Sedge Family (Cyperaceae)

Sclerocactus (Fish-hook Cactus) - Cactus Family (Cactaceae)

Scouring Rush (Equisetum) - Horsetail Family (Equisetaceae)

Screw-bean (Prosopis) - Pea Family (Fabaceae)

Scorpionweed (Phacelia) - Waterleaf Family (Hydrophyllaceae)

Scrophulariaceae (Figwort Family)

Scurfy-mallow (Malvella) - Mallow Family (Malvaceae)

Seaside-petunia (Calibrachoa) - Potato Family (Solanaceae)

Sebastiania (Milktree) - Spurge Family (Euphorbiaceae)

Sedge (Carex) - Sedge Family (Cyperaceae)

Sedge Family (Cyperaceae)

Seepweed (Suaeda) - Goosefoot Family (Chenopodiaceae)

Selaginella (Spike-moss) - Spike-moss Family (Selaginellaceae)

Selfheal (Prunella) - Mint Family (Lamiaceae)

Senecio (Ragwort) - Aster Family (Asteraceae)

Senita (Pachycereus) - Cactus Family (Cactaceae)

Senna (Wild Sensitive-plant) - Pea Family (Fabaceae)

Sesame Family (Pedaliaceae)

Setaria (Bristle Grass) - Grass Family (Poaceae)

Sheepburr (Lappula) - Borage Family (Boraginaceae)

Shootingstar (Dodecatheon) - Primrose Family (Primulaceae)

Sida (Fanpetals) - Mallow Family (Malvaceae)

Silene (Catchfly) - Pink Family (Caryophyllaceae)

Silktassel (Garrya) - Silktassel Family (Garryaceae)

Silktassel Family (Garryaceae)

Silverbush (Argythamnia) - Spurge Family (Euphorbiaceae)

Silverpuffs (Uropappus) - Aster Family (Asteraceae)

Simarouba Family (Simaroubaceae)

Simaroubaceae (Simarouba Family)

Simmondsia (Jojoba) - Jojoba Family (Simmondsiaceae)

Simmondsiaceae (Jojoba Family)

Siphonoglossa (Tubetongue) - Acanthus Family (Acanthaceae)

Sisyrinchium (Blue-eyed-grass) - Iris Family (Iridaceae)

Six-weeks Grass (Vulpia) - Grass Family (Poaceae)

Skyrocket (Ipomopsis) - Phlox Family (Polemoniaceae)

Snake-lily (Dichelostemma) - Lily Family (Liliaceae)

Snakeweed (Gutierrezia) - Aster Family (Asteraceae)

Snakeroot (Ageratina) - Aster Family (Asteraceae)

Snakewood (Condalia) - Buckthorn Family (Rhamnaceae)

Sneezeweed (Helenium) - Aster Family (Asteraceae)

Soapberry (Sapindus) - Soapberry Family (Sapindaceae)

Soapberry Family (Sapindaceae)

Solanaceae (Potato Family)

Solanum (Horse-nettle, Nightshade) - Potato Family (Solanaceae)

Solidago (Goldenrod) - Aster Family (Asteraceae)

Sorrel (Rumex) - Buckwheat Family (Polygonaceae)

Sotol (Dasylirion) - Lily Family (Liliaceae)

Spear Grass (Piptochaetium) - Grass Family (Poaceae)

Spectacle-fruit (Wislizenia) - Caper Family (Capparaceae)

Speedwell (Veronica) - Figwort Family (Scrophulariaceae)

Spermolepis (Scaleseed) - Carrot Family (Apiaceae)

Sphaeralcea (Globe-mallow) - Mallow Family (Malvaceae)

Sphinctospermum (Peaseed) - Pea Family (Fabaceae)

Spiderling (Boerhavia) - Four-o’clock Family (Nyctaginaceae)

Spiderwort Family (Commelinaceae)

Spike-moss (Selaginella) - Spike-moss Family (Selaginellaceae)

Spike-moss Family (Selaginellaceae)

Spineflower (Chorizanthe) - Buckwheat Family (Polygonaceae)

Spiranthes (Ladies-tresses) - Orchid Family (Orchidaceae)

Spleenwort (Asplenium) - Spleenwort Family (Aspleniaceae)

Sporobolus (Dropseed) - Grass Family (Poaceae)

Sprangletop (Leptochloa) - Grass Family (Poaceae)

Springbeauty (Claytonia) - Purselane Family (Portulacaceae)

Spruce (Picea) - Pine Family (Pinaceae)

Spurge (Euphorbia) - Spurge Family (Euphorbiaceae)

Spurge Family (Euphorbiaceae)

Squash (Cucurbita) - Cucumber Family (Cucurbitaceae)

Stachys (Hedge-nettle) - Mint Family (Lamiaceae)

Stenocereus (Organ-pipe Cactus) - Cactus Family (Cactaceae)

Stephanomeria (Wire-lettuce) - Aster Family (Asteraceae)

Sterculiaceae (Cacao Family)

Stevia (Candyleaf) - Aster Family (Asteraceae)

Stick-pea (Calliandra) - Pea Family (Fabaceae)

Stonecrop Family (Crassulaceae)

Stork’s-bill (Erodium) - Geranium Family (Geraniaceae)

Strawberry (Fragaria) - Rose Family (Rosaceae)

St. John’s-wort (Hypericum) - St. John’s-wort Family (Clusiaceae)

St. John’s-wort Family - Clusiaceae

Stylocline (Neststraw) - Aster Family (Asteraceae)

Sumac (Rhus) - Sumac Family (Anacardiaceae)

Sumac Family (Anacardiaceae)

Suncup (Camissonia) - Evening-primrose Family (Onagraceae)

Sundrops (Calylophus) - Evening-primrose Family (Onagraceae)

Streptanthus (Jewelflower) - Mustard Family (Brassicaceae)

Suaeda (Seepweed) - Goosefoot Family (Chenopodiaceae)

Swallow-wort (Cynanchum) - Milkweed Family (Asclepiadaceae)

Swamp-privet (Forestiera) - Olive Family (Oleaceae)

Sweetbush (Bebbia) - Aster Family (Asteraceae)

Sweet-cicely (Osmorhiza) - Carrot Family (Apiaceae)

Sweet-pea (Lathyrus) - Pea Family (Fabaceae)

Symphyotrichum (Prairie-aster) - Aster Family (Asteraceae)

Sycamore (Platanus) - Planetree Family (Platanaceae)


Tackstem (Calycoseris) - Aster Family (Asteraceae)

Talinum (Flameflower) - Purselane Family (Portulacaceae)

Tanglehead (Heteropogon) - Grass Family (Poaceae)

Tansy-aster (Machaeranthera) - Aster Family (Asteraceae)

Tansy-mustard (Descurainia) - Mustard Family (Brassicaceae)

Tecoma (Trumpetbush) - Trumpet-creeper Family (Bignoniaceae)

Tetraclea (Wrinklefruit) - Verbena Family (Verbenaceae)

Teucrium (Germander) - Mint Family (Lamiaceae)

Thalictrum (Meadow-rue) - Buttercup Family (Ranunculaceae)

Thamnosma (Turpentine-broom) - Rue Family (Rutaceae)

Thelypodium (Tumble-mustard) - Mustard Family (Brassicaceae)

Thimblehead (Hymenothrix) - Aster Family (Asteraceae)

Thimbleweed (Anemone) - Buttercup Family (Ranunculaceae)

Thistle (Cirsium) - Aster Family (Asteraceae)

Thorn-of-Christ (Castela) - Simarouba Family (Simaroubaceae)

Thoroughwort (Eupatorium) - Aster Family (Asteraceae)

Threadplant (Nemacladus) - Bellflower Family (Campanulaceae)

Threadstem (Pterostegia) - Buckwheat Family (Polygonaceae)

Three-awn (Aristida) - Grass Family (Poaceae)

Threefold (Trixis) - Aster Family (Asteraceae)

Three-seed-mercury (Acalypha) - Spurge Family (Euphorbiaceae)

Thorn-apple (Datura) - Potato Family (Solanaceae)

Thymophylla (Pricklyleaf) - Aster Family (Asteraceae)

Thysanocarpus (Fringpod) - Mustard Family (Brassicaceae)

Tick-trefoil (Desmodium) - Pea Family (Fabaceae)

Tidestromia (Honeysweet) - Amaranth Family (Amaranthaceae)

Tiquilia (Cricklemat) - Borage Family (Boraginaceae)

Toadflax (Nuttallanthus) - Figwort Family (Scrophulariaceae)

Toad’s-mouth (Sairocarpus) - Figwort Family (Scrophulariaceae)

Tobacco (Nicotiana) - Potato Family (Solanaceae)

Tobosagrass (Pleuraphis) - Grass Family (Poaceae)

Toxicodendron (Poison-ivy, Poison-oak, Poison-sumac) - Sumac Family (Anacardiaceae)

Tragia (Noseburn) - Spurge Family (Euphorbiaceae)

Treebine (Cissus) - Grape Family (Vitaceae)

Trianthema (Horse-purslane) Fig-marigold Family (Aizoaceae)

Tridens (Fluff Grass) - Grass Family (Poaceae)

Trifolium (Clover) - Pea Family (Fabaceae)

Triodanis (Venus’-looking-glass) - Bellflower Family (Campanulaceae)

Trisetum (False Oat) - Grass Family (Poaceae)

Trixis (Threefold) - Aster Family (Asteraceae)

Trumpetbush (Tecoma) - Trumpet-creeper Family (Bignoniaceae)

Trumpet-creeper Family (Bignoniaceae)

Tubetongue (Siphonoglossa) - Acanthus Family (Acanthaceae)

Tumamoc-globeberry (Tumamoca) - Cucumber Family (Cucurbitaceae)

Tumamoca (Tumamoc-globeberry) - Cucumber Family (Cucurbitaceae)

Tumble-mustard (Thelypodium) - Mustard Family (Brassicaceae)

Turpentine-broom (Thamnosma) - Rue Family (Rutaceae)

Twayblade (Listera) - Orchid Family (Orchidaceae)

Twinevine (Funastrum) - Milkweed Family (Asclepiadaceae)

Twining-snapdragon (Neogaerrhinum) - Figwort Family (Scrophulariaceae)

Typha (Cat-tail) - Cat-tail Family (Typhaceae)

Typhaceae (Cat-tail Family)


Unicorn-plant (Proboscidea) - Sesame Family (Pedaliaceae)

Ulmaceae (Elm Family)

Urochloa (Liverseed Grass) - Grass Family (Poaceae)

Uropappus (Silverpuffs) - Aster Family (Asteraceae)

Urticaceae (Nettle Family)


Vauquelinia (Arizona-rosewood) - Rose Family (Rosaceae)

Velvet-mallow (Horsfordia) - Mallow Family (Malvaceae)

Venus’-looking-glass (Triodanis) - Bellflower Family (Campanulaceae)

Verbenaceae (Verbena Family)

Verbena Family (Verbenaceae)

Verbena (Vervain) - Verbena Family (Verbenaceae)

Verbesina (Crownbeard, Wingstem) - Aster Family (Asteraceae)

Veronica (Speedwell) - Figwort Family (Scrophulariaceae)

Vervain (Verbena) - Verbena Family (Verbenaceae)

Vetch (Vicia) - Pea Family (Fabaceae)

Vetchling (Lathyrus) - Pea Family (Fabaceae)

Vicia (Vetch) - Pea Family (Fabaceae)

Viguiera (Goldeneye) - Aster Family (Asteraceae)

Viola (Violet) - Violet Family (Violaceae)

Violaceae (Violet Family)

Violet (Viola) - Violet Family (Violaceae)

Violet Family (Violaceae)

Virginia-creeper (Parthenocissus) - Grape Family (Vitaceae)

Virgin’s-bower (Clematis) - Buttercup Family (Ranunculaceae)

Viscaceae (Christmas Mistletoe Family)

Vitaceae (Grape Family)

Vitis (Grape) - Grape Family (Vitaceae)

Vulpia (Six-weeks Grass) - Grass Family (Poaceae)


Walnut (Juglans) - Walnut Family (Juglandaceae)

Walnut Family (Juglandaceae)

Waltheria (Raichie) - Cacao Family (Sterculiaceae)

Waterleaf Family (Hydrophyllaceae)

Water-milfoil (Myriophyllum) - Water-milfoil Family (Haloragaceae)

Water-milfoil Family (Haloragaceae)

Waternymph (Najas) - Waternymph Family (Najadaceae)

Waternymph Family (Najadaceae)

Water-willow (Justicia) - Acanthus Family (Acanthaceae)

Wattle (Acacia) - Pea Family (Fabaceae)

White-mallow (Eremalche) - Mallow Family (Malvaceae)

Whitepuff (Oligomeris) - Mignonette Family (Resedaceae)

Whitlow-grass (Draba) - Mustard Family (Brassicaceae)

Wild Basil (Clinopodium) - Mint Family (Lamiaceae)

Wild Buckwheat (Eriogonum) - Buckwheat Family (Polygonaceae)

Wild Carrot (Daucus) - Carrot Family (Apiaceae)

Wild Leek (Allium) - Lily Family (Liliaceae)

Wild Petunia (Ruellia) - (Acanthus Family (Acanthaceae)

Wild Rye (Elymus) - Grass Family (Poaceae)

Wild Sensitive-plant (Senna) - Pea Family (Fabaceae)

Willow (Salix) - Willow Family (Salicaceae)

Willow Family (Salicaceae)

Willowherb (Epilobium) - Evening-primrose Family (Onagraceae)

Windflower (Anemone) - Buttercup Family (Ranunculaceae)

Windmill Grass (Chloris) - Grass Family (Poaceae)

Windmills (Allionia) - Four-o’clock Family (Nyctaginaceae)

Wingpetal (Heterosperma) - Aster Family (Asteraceae)

Wingstem (Verbesina) - Aster Family (Asteraceae)

Wire-lettuce (Stephanomeria) - Aster Family (Asteraceae)

Wislizenia (Spectacle-fruit) - Caper Family (Capparaceae)

Wolf’s-tail (Lycurus) - Grass Family (Poaceae)

Wood Fern Family (Dryopteridaceae)

Woodsia (Cliff Fern) - Wood Fern Family (Dryopteridaceae)

Woollygrass (Dasyochloa) - Grass Family (Poaceae)

Woollywhite (Hymenopappus) - Aster Family (Asteraceae)

Woolstar (Eriastrum) - Phlox Family (Polemoniaceae)

Wormwood (Artemisia) - Aster Family (Asteraceae)

Wrightwort (Carlowrightia) - Acanthus Family (Acanthaceae)

Wrinklefruit (Tetraclea) - Verbena Family (Verbenaceae)


Yabea (False Hedge-parsley) - Carrot Family (Apiaceae)

Yarrow (Achillea) - Aster Family (Asteraceae)

Yellowhood (Nissolia) - Pea Family (Fabaceae)

Yellowshow (Amoreuxia) - Lipsticktree Family (Bixaceae)

Yucca (Yucca) - Century-plant Family (Agavaceae)

Yucca (Yucca) - Century-plant Family (Agavaceae)


Zannichellia (Horned-pondweed) - Horned-pondweed Family (Zannichelliaceae)

Zannichelliaceae (Horned-pondweed Family)

Zinnia (Zinnia) - Aster Family (Asteraceae)

Zinnia (Zinnia) - Aster Family (Asteraceae)

Ziziphus (Jujube) - Buckthorn Family (Rhamnaceae)