| Common name(s) | Family | Genus | Species | Code | Alternative Common Name |
| abert’s buckwheat | Polygonaceae | Eriogonum | abertianum | ERAB | |
| Abert’s creeping zinnia | Asteraceae | Sanvitalia | abertii | SAAB | abert’s dome |
| algerita | Berberidaceae | Berberis | haematocarpa | BEHA | red barberry |
| alkali sacaton | Poaceae | Sporobolus | airoides | SPAI | |
| alkali swainsonpea | Fabaceae | Sphaerophysa | salsula | SPSA | Austrian field-pea |
| American basketflower | Asteraceae | Centaurea | americana | CEAM | |
| American bugseed | Chenopodiaceae | Corispermum | americanum | COAM | tickseed |
| American licorice | Fabaceae | Glycyrrhiza | lepidota | GLLE | |
| American threefold | Asteraceae | Trixis | californica | TRCA | Trixis |
| andean prairie clover | Fabaceae | Dalea | cylindriceps | DACY | |
| annual buckwheat | Polygonaceae | Eriogonum | annuum | ERAN | |
| annual golden-eye | Asteraceae | Viguiera | longifolia | VILO | |
| annual rabbitfoot grass | Poaceae | Polypogon | monspeliensis | POMO | |
| annual ragweed | Asteraceae | Ambrosia | artemisiifolia | AMAR | |
| annual Townsend daisy | Asteraceae | Townsendia | annua | TOAN | townsendia |
| annual windmills | Nyctaginaceae | Allionia | choisyi | ALCH | smooth umbrella-wort |
| apache plume | Rosaceae | Fallugia | paradoxa | FAPA | |
| Arabian schismus | Poaceae | Schismus | arabicus | SCAR | mediterraneangrass |
| aridland goosefoot | Chenopodiaceae | Chenopodium | dessicatum | CHDE | thickleaf goosefoot |
| Arizona cottontop | Poaceae | Digitaria | californica | DICA | |
| Arizona onion | Alliaceae | Allium | macropetalum | ALMA | |
| Arizona signalgrass | Poaceae | Urochloa | arizonica | URAR | |
| Arizona snakecotton | Amaranthaceae | Froelichia | arizonica | FRAR | |
| arrow-weed | Asteraceae | Pluchea | sericea | PLSE | |
| arrowleaf mallow | Malvaceae | Malvella | sagittaefolia | MASA | scurfy sida |
| ashen milkvetch | Fabaceae | Astragalus | tephrodes | ASTE | silverline locoweed |
| asian mustard | Brassicaceae | Brassica | tournefortii | BRTO | |
| asparagus | Asparagaceae | Asparagus | officinalis | ASOF | |
| babyslippers | Violaceae | Hybanthus | verticillatus | HYVE | green violet |
| bajada lupine | Fabaceae | Lupinus | concinnus | LUCO | |
| balloonbush | Plantaginaceae | Maurandya | wislizenii | MAWI | net-cup snapdragon vine |
| banana yucca; datil | Agavaceae | Yucca | baccata | YUBA | |
| barnyardgrass | Poaceae | Echinochloa | crusgallii | ECCR | |
| bastardsage | Polygonaceae | Eriogonum | wrightii | ERWR | wright’s buckwheat |
| bearded cyptantha | Boraginaceae | Cryptantha | barbigera | CRBA | bearded cat’s-eye |
| bearded prairie clover | Fabaceae | Dalea | pogonathera | DAPO | |
| bearded sprangletop | Poaceae | Leptochloa | fascicularis | LEFA | |
| beardlip penstemon | Plantaginaceae | Penstemon | barbatus | PEBA | southwestern penstemon |
| berlandier’s wolfberry | Solanaceae | Lycium | berlandieri | LYBE | |
| bermudagrass | Poaceae | Cynodon | dactylon | CYDA | |
| bicolor fanmustard | Brassicaceae | Nerisyrenia | camporum | NECA | white sands mustard |
| big galleta | Poaceae | Pleuraphis | rigida | PLRI | |
| big sacaton | Poaceae | Sporobolus | wrightii | SPWR | |
| bigbract verbena | Verbenaceae | Verbena | bracteata | VEBR | carpet vervain |
| bigelow’s bluegrass | Poaceae | Poa | bigelovii | POBI | |
| bigelow’s linanthus | Polemoniaceae | Linanthus | bigelovii | LIBI | |
| bitter rubberweed | Asteraceae | Hymenoxys | odorata | HYOD | bitterweed |
| black grama | Poaceae | Bouteloua | eriopoda | BOER | |
| black-spined prickly pear | Cactaceae | Opuntia | macrocentra | OPMA | |
| bladder mallow | Malvaceae | Herissantia | crispa | HECR | |
| blue grama | Poaceae | Bouteloua | gracilis | BOGR | |
| blue panicum | Poaceae | Panicum | antidotale | PAAN | |
| blue threeawn | Poaceae | Aristida | purpurea | ARPU | neally’s threeawn |
| blue trumpets | Polemoniaceae | Ipomopsis | longiflora | IPLO | flaxflowered ipomopsis |
| blunt-scale bahia | Asteraceae | Bahia | pedata | BAPE | |
| bracted bedstraw | Rubiaceae | Galium | microphyllum | GAMI | |
| branched noseburn | Euphorbicaeae | Tragia | ramosa | TRRA | |
| bristly nama | Hydrophyllaceae | Nama | hispidum | NAHI | purple curl-leaf |
| bristly wolftail | Poaceae | Lycurus | setosus | LYSE | |
| broom dalea | Fabaceae | Psorothamnus | scoparius | PSSC | |
| broom snakeweed | Asteraceae | Gutierrezia | sarothrae | GUSA | |
| brownplume wirelettuce | Asteraceae | Stephanomeria | pauciflora | STPA | few-flowered wire-lettuce |
| browntop signalgrass | Poaceae | Urochloa | fasciculata | URFA | |
| buffalobur nightshade | Solanaceae | Solanum | rostratum | SORO | |
| buffpetal | Malvaceae | Rhynchosida | physocalyx | RHPH | balloon sida |
| bullgrass | Poaceae | Muhlenbergia | emersleyi | MUEM | |
| bur ragweed | Asteraceae | Ambrosia | acanthicarpa | AMAC | |
| burrograss | Poaceae | Scleropogon | brevifolius | SCBR | |
| bush croton | Euphorbicaeae | Croton | fruticulosus | CRFR | |
| bush muhly | Poaceae | Muhlenbergia | porteri | MUPO | |
| Bush seepweed | Chenopodiaceae | Suaeda | nigra | SUNI | desert seepweed |
| cactus apple | Cactaceae | Opuntia | engelmannii | OPEN | englemann’s prickly pear |
| California brickellbush | Asteraceae | Brickellia | californica | BRCA | |
| California poppy | Papaveraceae | Eschscholzia | californica | ESCA | Mexican poppy |
| Canada cocklebur | Asteraceae | Xanthium | strumarium | XAST | cocklebur |
| Canadian horseweed | Asteraceae | Conyza | canadensis | COCA | |
| canaigre dock | Polygonaceae | Rumex | hymenosepalus | RUHY | wild rhubarb; canaigre |
| candy barrelcactus | Cactaceae | Ferocactus | wislizeni | FEWI | fishhook barrel |
| cane bluestem | Poaceae | Bothriochloa | barbinodis | BOBA | |
| Carolina crabgrass | Poaceae | Digitaria | pubiflora | DIPU | fall witchgrass |
| cat-nip noseburn | Euphorbicaeae | Tragia | nepetifolia | TRNE | |
| catclaw mimosa | Fabaceae | Mimosa | aculeaticarpa | MIAC | wait-a-minute bush |
| caterpillars | Hydrophyllaceae | Phacelia | congesta | PHCN | tight phacelia |
| Chihuahua flax | Linaceae | Linum | australe | LIAU | |
| Chihuahua lovegrass | Poaceae | Eragrostis | erosa | ERER | |
| Chihuahuan brickellbush | Asteraceae | Brickellia | floribunda | BRFL | |
| Chinese thorn-apple | Solanaceae | Datura | quercifolia | DAQU | oak-leaf thornapple |
| chocolate flower | Asteraceae | Berlandiera | lyrata | BELY | |
| christmas cactus | Cactaceae | Cylindropuntia | leptocaulis | CYLE | christmas cholla |
| climbing milkweed | Asclepiadaceae | Sarcostemma | cynanchoides | SACY | |
| climbing wartclub | Nyctaginaceae | Commicarpus | scandens | COSC | wartclub |
| coastal sandbur | Poaceae | Cenchrus | spinifex | CESP | |
| cockroach plant | Apocynaceae | Haplophyton | crooksii | HACR | |
| collegeflower | Asteraceae | Hymenopappus | flavescens | HYFL | wooly-white |
| Colorado Desert mistletoe | Viscaceae | Phoradendron | macrophyllum | PHMA | cottonwood mistletoe |
| Colorado four o’clock | Nyctaginaceae | Mirabilis | multiflora | MIMU | desert four o’clock |
| common hoptree | Rutaceae | Ptelea | trifoliata | PTTR | wafer ash; hoptree |
| common reed | Poaceae | Phragmites | australis | PHAU | |
| common sotol | Nolinaceae | Dasylirion | wheeleri | DAWH | |
| common sunflower | Asteraceae | Helianthus | annuus | HEAN | |
| common threesquare | Cyperaceae | Schoenoplectus | pungens | SCPU | three-square bulrush |
| common wolftail | Poaceae | Lycurus | phleoides | LYPH | |
| cooley’s bundleflower | Fabaceae | Desmanthus | cooleyi | DECO | |
| copper globemallow | Malvaceae | Sphaeralcea | angustifolia | SPAN | narrow-leaf globemallow |
| cottonbatting plant | Asteraceae | Pseudognaphalium | stramineum | PSST | western cudweed |
| Coulter’s horseweed | Asteraceae | Laennecia | coulteri | LACO | coulter conyza |
| coulter’s spiderling | Nyctaginaceae | Boerhavia | coulteri | BOCL | |
| coulter’s wrinklefruit | Verbenaceae | Tetraclea | coulteri | TECO | |
| coulter’s wrinklefruit | Verbenaceae | Tetraclea | coulteri | TECO | |
| creeping spiderling | Nyctaginaceae | Boerhavia | spicata | BOSP | spike spiderling |
| creeping spiderling | Nyctaginaceae | Boerhavia | torreyana | BOTO | torrey’s spiderling |
| creosote bush; gobernadora | Zygophyllaceae | Larrea | tridentata | LATR | |
| crested anoda | Malvaceae | Anoda | cristata | ANCR | spurred anoda |
| crestrib morning-glory | Convolvulaceae | Ipomoea | costellata | IPCO | |
| crown of thorns | Koeberliniaceae | Koeberlinia | spinosa | KOSP | crucifixion thorn; allthorn |
| curlycup gumweed | Asteraceae | Grindelia | squarrosa | GRSQ | |
| dainty desert hideseed | Hydrophyllaceae | Eucrypta | micrantha | EUMI | eucrypta |
| dakota mock vervain | Verbenaceae | Glandularia | bipinnatifida | GLBI | |
| damianita | Asteraceae | Chrysactinia | mexicana | CHME | |
| david’s spurge | Euphorbicaeae | Euphorbia | davidii | EUDE | david’s poinsettia |
| desert ceanothus | Rhamnaceae | Ceanothus | greggii | CEGR | |
| desert evening primrose | Onagraceae | Oenothera | primiveris | OEPR | bottle evening primrose |
| desert false indigo | Fabaceae | Amorpha | fruticosa | AMFR | false indigo-bush |
| desert holly | Asteraceae | Acourtia | nana | ACNA | |
| desert lovegrass | Poaceae | Eragrostis | pectinacea | ERPE | |
| desert marigold | Asteraceae | Baileya | multiradiata | BAMU | |
| desert pincushion | Asteraceae | Chaenactis | stevioides | CHST | |
| desert tobacco | Solanaceae | Nicotiana | trigonophylla | NITR | |
| desert unicorn-plant | Pedaliaceae | Proboscidea | althaeifolia | PRAL | golden devil’s claw |
| desert willow | Bignoniaceae | Chilopsis | linearis | CHLI | |
| desert willow | Bignoniaceae | Chilopsis | linearis | CHLI | |
| desert zinnia | Asteraceae | Zinnia | acerosa | ZIAC | plains zinnia |
| devilshead | Cactaceae | Echinocactus | horizonthalonius | ECHO | turk’s head cactus |
| doubleclaw | Pedaliaceae | Proboscidea | parviflora | PRPA | red devil’s claw |
| drummond’s clematis | Ranunculaceae | Clematis | drummondii | CLDR | |
| dryopetalon | Brassicaceae | Dryopetalon | runcinatum | DRRU | rockmustard |
| dwarf false pennyroyal | Lamiaceae | Hedeoma | nana | HENA | |
| dwarf indian mallow | Malvaceae | Abutilon | parvulum | ABPA | |
| dwarf ipomopsis | Polemoniaceae | Ipomopsis | pumila | IPPU | dwarf gilia |
| dwarf mentzelia | Loasaceae | Mentzelia | pumila | MEPU | bullet stickleaf |
| dwarf praire clover | Fabaceae | Dalea | nana | DANA | dwarf dalea |
| dwarf stickpea | Fabaceae | Calliandra | humilis | CAHU | low fairyduster |
| ear muhly | Poaceae | Muhlenbergia | arenacea | MUAR | |
| eastern annual saltmarsh aster | Asteraceae | Symphyotrichum | subulatum | SYSU | seaside aster |
| El Paso gilia | Polemoniaceae | Gilia | mexicana | GIME | Mexican gilia |
| espanta vaquero; wooly honeysweet | Amaranthaceae | Tidestromia | lanuginosa | TILA | |
| false buffalograss | Poaceae | Munroa | squarrosa | MUSQ | |
| false carrot | Apiaceae | Yabea | microcarpa | YAMI | |
| feather fingergrass | Poaceae | Chloris | virgata | CHVI | showy chloris |
| featherplume | Fabaceae | Dalea | formosa | DAFO | feather indigobush |
| Fendler threeawn | Poaceae | Aristida | purpurea | ARPU | red threeawn |
| fendler’s bladderpod | Brassicaceae | Physaria | fendleri | PHFE | |
| Fendler’s desertdandelion | Asteraceae | Malacothrix | fendleri | MAFE | desert dandelion |
| fendler’s globemallow | Malvaceae | Sphaeralcea | fendleri | SPFE | |
| fendler’s muttongrass | Poaceae | Poa | fendleriana | POFE | |
| fendler’s penstemon | Plantaginaceae | Penstemon | fendleri | PEFE | |
| fendler’s threeawn | Poaceae | Aristida | purpurea | ARPU | |
| field wormwood | Asteraceae | Artemisia | campestris | ARCA | |
| firewheel | Asteraceae | Gaillardia | pulchella | GAPU | |
| five-stamen tamarisk | Tamaricaceae | Tamarix | chinensis | TACH | salt cedar; tamarisk |
| fiveneedle pricklyleaf | Asteraceae | Thymophylla | pentachaeta | THPE | parralena |
| fivewing spiderling | Nyctaginaceae | Boerhavia | intermedia | BOIN | |
| flatglobe dodder | Cuscutaceae | Cuscuta | umbellata | CUUM | plains dodder |
| flatspine stickseed | Boraginaceae | Lappula | occidentalis | LAOC | |
| fluff-root | Asteraceae | Acourtia | wrightii | ACWR | |
| four-wing saltbush | Chenopodiaceae | Atriplex | canescens | ATCA | |
| fourvalve mimosa | Fabaceae | Mimosa | quadrivalvis | MIQU | western sensitive briar |
| fragrant heliotrope | Heliotropaceae | Heliotropium | greggii | HEGR | |
| fringed pigweed | Amaranthaceae | Amaranthus | fimbriatus | AMFI | |
| fringeleaf necklacepod | Fabaceae | Sophora | stenophylla | SOST | silvery sophory |
| giant dropseed | Poaceae | Sporobolus | giganteus | SPGI | |
| giant sumpweed | Asteraceae | Cyclachaena | xanthiifolia | CYXA | bur-leaf sumpweed |
| gilia beardtongue | Plantaginaceae | Penstemon | ambiguus | PEAM | moth penstemon |
| goat’s beard, yellow salsify | Asteraceae | Tragopogon | dubius | TRDU | |
| golden crownbeard | Asteraceae | Verbesina | encelioides | VEEN | cowpen daisy |
| goodding willow | Salicaceae | Salix | gooddingii | SAGO | |
| goosefoot moonpod | Nyctaginaceae | Acleisanthes | chenopodioides | ACCH | |
| gordon’s bladderpod | Brassicaceae | Physaria | gordonii | PHGO | |
| Graham’s nipple cactus | Cactaceae | Mammillaria | grahamii | MAGR | tangled fishhook cactus |
| gray globemallow | Malvaceae | Sphaeralcea | incana | SPIN | pale globemallow |
| Gray’s feverfew | Asteraceae | Parthenium | confertum | PACO | parthenium |
| green bristlegrass | Poaceae | Setaria | viridis | SEVI | |
| green carpetweed | Molluginaceae | Mollugo | verticillata | MOVE | |
| green prairie coneflower | Asteraceae | Ratibida | tagetes | RATA | prairie coneflower |
| green sprangletop | Poaceae | Leptochloa | dubia | LEDU | |
| Greene’s bird’s-foot trefoil | Fabaceae | Lotus | greenei | LOGR | greene’s lotus |
| greenleaf five eyes | Solanaceae | Chamaesaracha | coronopus | CHCO | crowfoot chamaesaracha |
| greenstripe | Amaranthaceae | Acanthochiton | wrightii | ACWR | |
| groundplum milkvetch | Fabaceae | Astragalus | crassicarpus | ASCR | ground plum |
| gyp dropseed | Poaceae | Sporobolus | nealleyi | SPNE | |
| gypsum phacelia | Hydrophyllaceae | Phacelia | integrifolia | PHIT | sand phacelia |
| hairy ayenia | Sterculiaceae | Ayenia | pilosa | AYPI | false noseburn |
| hairy caltrop | Zygophyllaceae | Kallstroemia | hirsutissima | KAHI | hairy carpetweed |
| hairy five eyes | Solanaceae | Chamaesaracha | sordida | CHSO | dingy chamaesaracha |
| hairy grama | Poaceae | Bouteloua | hirsuta | BOHI | |
| hairy-seed bahia | Asteraceae | Bahia | absinthiifolia | BAAB | |
| halfmoon milkvetch | Fabaceae | Astragalus | allochrous | ASAL | halfmoon locoweed |
| halfmoon milkvetch | Fabaceae | Astragalus | allochrous | ASAL | wooton’s locoweed |
| hall’s panicgrass | Poaceae | Panicum | hallii | PAHA | |
| harmal peganum | Zygophyllaceae | Peganum | harmala | PEHA | African rue |
| hartweg’s sundrops | Onagraceae | Oenothera | hartwegii | OEHA | |
| Hartweg’s twinevine | Asclepiadaceae | Sarcostemma | cynanchoides | SACY | |
| harvard threeawn | Poaceae | Aristida | havardii | ARHA | |
| heath carlowrightia | Acanthaceae | Carlowrightia | linearifolia | CALI | |
| hoary false goldenaster | Asteraceae | Heterotheca | canescens | HECA | gray camphorweed |
| hoary tansyaster | Asteraceae | Dieteria | canescens | DICA | Smooth Sand Daisy |
| honey locust | Fabaceae | Gleditsia | triacanthos | GLTR | |
| honey mesquite | Fabaceae | Prosopis | glandulosa | PRGL | |
| Hopi tea greenthread | Asteraceae | Thelesperma | megapotamicum | THME | navajo tea |
| horsetail milkweed | Asclepiadaceae | Asclepias | subverticillata | ASSU | |
| indian ricegrass | Poaceae | Achnatherum | hymenoides | ACHY | |
| Indian rushpea | Fabaceae | Hoffmannseggia | glauca | HOGL | hog potato |
| intermediate pepperweed | Brassicaceae | Lepidium | virginicum | LEVI | longpetal pepperweed |
| ivyleaf groundcherry | Solanaceae | Physalis | hederifolia | PHHE | heartleaf groundcherry |
| james’ buckwheat | Polygonaceae | Eriogonum | jamesii | ERJA | |
| James’ cryptantha | Boraginaceae | Cryptantha | cinerea | CRCI | james’ popcorn |
| James’ holdback | Fabaceae | Pomaria | jamesii | POJA | james’ hog potato |
| jimmy-weed | Asteraceae | Isocoma | pluriflora | ISPL | |
| johnsongrass | Poaceae | Sorghum | halepense | SOHA | |
| juniper globemallow | Malvaceae | Sphaeralcea | digitata | SPDI | |
| kingcup cactus | Cactaceae | Echinocereus | triglochidiatus | ECTR | claret-cup hedgehog |
| kiss me quick | Portulaceae | Portulaca | pilosa | POPI | shaggy-leaf |
| knotgrass | Poaceae | Paspalum | distichum | PADI | |
| lamb’s quarter | Chenopodiaceae | Chenopodium | album | CHAL | |
| largebract spiderling | Nyctaginaceae | Boerhavia | wrightii | BOWR | wright’s spiderling |
| leatherweed | Euphorbicaeae | Croton | pottsii | CRPO | |
| lehmann’s lovegrass | Poaceae | Eragrostis | lehmanniana | ERLE | |
| lemonscent | Asteraceae | Pectis | angustifolia | PEAN | limoncillo |
| lesser yellowthroat gillia | Polemoniaceae | Gilia | flavocincta | GIFL | southern gilia |
| lineleaf whitepuff | Resedaceae | Oligomeris | linifolia | OLLI | oligomeris |
| little deserttrumpet | Polygonaceae | Eriogonum | trichopes | ERTR | thread-stem buckwheat |
| little hogweed | Portulaceae | Portulaca | oleracea | POOL | purslane |
| little nipple cactus | Cactaceae | Mammillaria | heyderi | MAHE | pancake pincushion cactus |
| littleleaf ratany | Krameriaceae | Krameria | erecta | KRER | range ratany |
| littleleaf sumac | Anacardiaceae | Rhus | microphylla | RHMI | |
| London rocket | Brassicaceae | Sisymbrium | irio | SIIR | |
| longcapsule suncup | Onagraceae | Eremothera | chamaenerioides | ERCH | fireweed suncup |
| longleaf jointfir | Ephedraceae | Ephedra | trifurca | EPTR | longleaf ephedra, canutillo |
| lotebush | Rhamnaceae | Ziziphus | obtusifolia | ZIOB | |
| Louisiana broomrape | Orobanchaceae | Orobanche | ludoviciana | ORLU | |
| louisiana vetch | Fabaceae | Vicia | ludoviciana | VILU | silm vetch |
| louisiana wormwood | Asteraceae | Artemisia | ludoviciana | ARLU | |
| low cryptantha | Boraginaceae | Cryptantha | pusilla | CRPU | low cat’s-eye |
| low woollygrass | Poaceae | Dasyochloa | pulchella | DAPU | fluffgrass |
| lyreleaf jewelflower | Brassicaceae | Streptanthus | carinatus | STCA | Arizona jewelflower |
| Madagascar dropseed | Poaceae | Sporobolus | pyramidatus | SPPY | six-weeks dropseed |
| manybristle chinchweed | Asteraceae | Pectis | papposa | PEPA | chinchweed |
| mariola | Asteraceae | Parthenium | incanum | PAIN | |
| mat sandbur | Poaceae | Cenchrus | longispinus | CELO | |
| matted bluet | Rubiaceae | Houstonia | humifusa | HOHU | |
| meadow flax | Linaceae | Linum | pratense | LIPR | |
| mealy goosefoot | Chenopodiaceae | Chenopodium | incanum | CHIN | gray goosefoot |
| melon-leaf nightshade | Solanaceae | Solanum | heterodoxum | SOHE | |
| melonloco | Cucurbitaceae | Apodanthera | undulata | APUN | |
| mesa dropseed | Poaceae | Sporobolus | flexuosus | SPFL | |
| mesa pepperwort | Brassicaceae | Lepidium | alyssoides | LEAL | mountain pepperweed |
| Mexican buckeye | Sapindaceae | Ungnadia | speciosa | UNSP | |
| Mexican clammy-weed | Capparidaceae | Polanisia | dodecandra | PODO | |
| Mexican devilweed | Asteraceae | Chloracantha | spinosa | CHSP | |
| Mexican dock | Polygonaceae | Rumex | mexicanus | RUME | |
| mexican fireweed | Chenopodiaceae | Kochia | scoparia | KOSC | |
| Mexican panicgrass | Poaceae | Panicum | hirticaule | PAHI | Mexican witchgrass |
| miniature wooly star | Polemoniaceae | Eriastrum | diffusum | ERDI | |
| Missouri gourd | Cucurbitaceae | Cucurbita | foetidissima | CUFO | buffalo-gourd; coyote-gourd |
| mojave milkweed | Asclepiadaceae | Asclepias | nyctaginifolia | ASNY | |
| mosquito plant | Lamiaceae | Agastache | cana | AGCA | |
| narrowleaf four o’clock | Nyctaginaceae | Mirabilis | linearis | MILI | ribbon four o’clock |
| narrowleaf goosefoot | Chenopodiaceae | Chenopodium | leptophyllum | CHLE | |
| narrowleaf willow | Salicaceae | Salix | exigua | SAEX | sandbar willow |
| Nealley’s woollygrass | Poaceae | Erioneuron | nealleyi | ERNE | nealley’s tridens |
| needle grama | Poaceae | Bouteloua | aristidoides | BOAR | |
| net-leaf hackberry | Cannabaceae | Celtis | reticulata | CERE | |
| New Mexico agave; mescal | Agavaceae | Agave | parryi | AGPA | |
| New Mexico bird’s-foot trefoil | Fabaceae | Lotus | plebeius | LOPL | New Mexico lotus |
| New Mexico copperleaf | Euphorbicaeae | Acalypha | neomexicana | ACNM | New Mexico mercury |
| New Mexico plumeseed | Asteraceae | Rafinesquia | neomexicana | RANE | desert chicory |
| night blooming cereus | Cactaceae | Peniocereus | greggii | PEGR | |
| nineawn pappusgrass | Poaceae | Enneapogon | desvauxii | ENDE | feather papusgrass |
| nipple beehive cactus | Cactaceae | Coryphantha | macromeris | COMA | |
| nodding buckwheat | Polygonaceae | Eriogonum | cernuum | ERCE | |
| ocotillo | Fouquieriaceae | Fouquieria | splendens | FOSP | |
| one-flowered sedge | Cyperaceae | Cyperus | retroflexus | CYRE | |
| one-seed juniper | Cupressaceae | Juniperus | monosperma | JUMO | |
| orange fameflower | Portulaceae | Talinum | aurantiacum | TAAU | |
| orange fameflower | Portulaceae | Talinum | polygaloides | TAPO | yellow fameflower |
| Orcutt’s threeawn | Poaceae | Aristida | schiedeana | ARSC | begger-tick grass |
| Organ Mountain larkspur | Ranunculaceae | Delphinium | wootonii | DEWO | wooton’s larkspur |
| osage orange | Moraceae | Maclura | pomifera | MAPO | |
| othake | Asteraceae | Palafoxia | sphacelata | PASP | rayed palafoixa |
| Pacific mistletoe | Viscaceae | Phoradendron | villosum | PHVI | fuzzy mistletoe |
| pale bastard toadflax | Santalaceae | Comandra | umbellata | COUM | |
| pale desert-thorn | Solanaceae | Lycium | pallidum | LYPA | pale wolfberry |
| pale evening primrose | Onagraceae | Oenothera | pallida | OEPA | sawtooth evening primrose |
| Paleface | Malvaceae | Hibiscus | denudatus | HIDE | pale hibiscus |
| palmer’s spiderling | Nyctaginaceae | Boerhavia | coulteri | BOCL | |
| Panamint cryptantha | Boraginaceae | Cryptantha | angustifolia | CRAN | narrow-leaved cryptantha |
| parry’s grama | Poaceae | Bouteloua | parryi | BOPA | |
| parry’s sandmat | Euphorbicaeae | Chamaesyce | parryi | CHPA | parry’s spurge |
| phlox heliotrope | Heliotropaceae | Heliotropium | convolvulaceum | HECO | bindweed heliotrope |
| pigweed | Amaranthaceae | Amaranthus | palmeri | AMPA | |
| pinkflower hedgehog cactus | Cactaceae | Echinocereus | fendleri | ECFE | fendler’s hedgehog |
| pitted goosefoot | Chenopodiaceae | Chenopodium | berlandieri | CHBE | |
| plains blackfoot | Asteraceae | Melampodium | leucanthum | MELE | blackfoot daisy |
| plains dozedaisy | Asteraceae | Aphanostephus | ramosissimus | APRA | faintcrown |
| plains fleabane | Asteraceae | Erigeron | modestus | ERMO | |
| plains lovegrass | Poaceae | Eragrostis | intermedia | ERIN | |
| plains sunflower | Asteraceae | Helianthus | petiolaris | HEPE | |
| pope’s phacelia | Hydrophyllaceae | Phacelia | popei | PHPO | |
| prairie boneset | Asteraceae | Brickellia | eupatorioides | BREU | |
| prairie dogweed; fetid marigold | Asteraceae | Dyssodia | papposa | DYPA | |
| prairie spiderwort | Commelinaceae | Tradescantia | occidentalis | TROC | western spiderwort |
| prickleleaf dogweed | Asteraceae | Thymophylla | acerosa | THAC | |
| prickly Russian thistle | Chenopodiaceae | Salsola | tragus | SATR | |
| prostrate pigweed | Amaranthaceae | Amaranthus | blitoides | AMBL | |
| puccoon | Boraginaceae | Lithospermum | incisum | LIIN | puccoon |
| puncture vine; goat head | Zygophyllaceae | Tribulus | terrestris | TRTE | |
| purple sand verbena | Nyctaginaceae | Abronia | angustifolia | ABAN | narrowleaf sand verbena |
| purple threeawn | Poaceae | Aristida | purpurea | ARPU | Jornada threeawn |
| purple threeawn | Poaceae | Aristida | purpurea | ARPU | |
| ragged marsh-elder | Asteraceae | Hedosyne | ambrosiifolia | HEAM | ragleaf sumpweed |
| ragged nettle-spurge | Euphorbicaeae | Jatropha | macrorhiza | JAMA | |
| rainbow cactus | Cactaceae | Echinocereus | pectinatus | ECPE | |
| ram’s horn | Pedaliaceae | Proboscidea | louisianica | PRLO | pale devil’s claw |
| red cyphomeris | Nyctaginaceae | Cyphomeris | gypsophiloides | CYGY | delicate darling |
| red dome blanketflower | Asteraceae | Gaillardia | pinnatifida | GAPI | blanketflower |
| red-root | Boraginaceae | Cryptantha | micrantha | CRMI | |
| redberry juniper | Cupressaceae | Juniperus | coahuilensis | JUCO | roseberry juniper |
| redstem stork’s bill | Geraniaceae | Erodium | cicutarium | ERCI | redstem filaree |
| rescuegrass | Poaceae | Bromus | catharticus | BRCA | |
| ribseed sandmat | Euphorbicaeae | Chamaesyce | glyptosperma | CHGL | ridge-seed spurge |
| rice cutgrass | Poaceae | Leersia | oryzoides | LEOR | |
| Riddell’s ragwort | Asteraceae | Senecio | riddellii | SERI | riddell’s groundsel |
| Rio Grande cottonwood | Salicaceae | Populus | deltoides | PODE | |
| Rocky Mountain zinnia | Asteraceae | Zinnia | grandiflora | ZIGR | desert zinnia |
| rockyscree false goldenaster | Asteraceae | Heterotheca | fulcrata | HEFU | green camphorweed |
| rose heath | Asteraceae | Chaetopappa | ericoides | CHER | sand aster |
| rosy gilia | Polemoniaceae | Gilia | sinuata | GISI | desert gilia |
| rough cocklebur | Asteraceae | Xanthium | strumarium | XAST | cocklebur |
| rough menodora | Oleaceae | Menodora | scabra | MESC | |
| rough menodora | Oleaceae | Menodora | scabra | MESC | |
| roundleaf buckwheat | Polygonaceae | Eriogonum | rotundifolium | ERRO | saucer-leaf buckwheat |
| roundleaf snakeweed | Asteraceae | Gutierrezia | sphaerocephala | GUSP | annual snakeweed |
| roving sailor | Plantaginaceae | Maurandya | antirrhiniflora | MAAN | little snapdragon vine |
| running fleabane | Asteraceae | Erigeron | tracyi | ERTA | Colorado fleabane |
| rusty lupine | Fabaceae | Lupinus | pusillus | LUPU | dwarf lupine |
| sacred thorn-apple | Solanaceae | Datura | wrightii | DAWR | sacred datura |
| salt heliotrope | Heliotropaceae | Heliotropium | curassavicum | HECU | seaside heliotrope |
| saltgrass | Poaceae | Distichlis | spicata | DISP | inland saltgrass |
| saltmarsh dodder | Cuscutaceae | Cuscuta | salina | CUSA | |
| sand bluestar | Apocynaceae | Amsonia | tomentosa | AMTO | |
| sand dropseed | Poaceae | Sporobolus | cryptandrus | SPCR | |
| sand muhly | Poaceae | Muhlenbergia | arenicola | MUAL | |
| sand reverchonia | Euphorbicaeae | Reverchonia | arenaria | REAR | sandymat |
| sand sage | Asteraceae | Artemisia | filifolia | ARFI | |
| sanddune wallflower | Brassicaceae | Erysimum | capitatum | ERCA | douglas’ wallflower |
| sandyseed clammyweed | Capparidaceae | Polanisia | dodecandra | PODO | clammy-weed |
| sawtooth sandmat | Euphorbicaeae | Chamaesyce | serrula | CHSR | sawtooth spurge |
| scarlet beeblossom | Onagraceae | Gaura | coccinea | GACO | scarlet gaura |
| scarlet globemallow | Malvaceae | Sphaeralcea | coccinea | SPCO | |
| scarlet hedgehog cactus | Cactaceae | Echinocereus | coccineus | ECCO | |
| scarlet spiderling | Nyctaginaceae | Boerhavia | coccinea | BOCO | |
| scheer’s beehive cactus | Cactaceae | Coryphantha | robustispina | COSC | scheer’s cory-cactus |
| scrambled eggs | Fumariaceae | Corydalis | aurea | COAU | golden smoke |
| scratchgrass | Poaceae | Muhlenbergia | asperifolia | MUAS | |
| screwbean mesquite; tornillo | Fabaceae | Prosopis | pubescens | PRPU | |
| scurfymallow | Malvaceae | Malvella | lepidota | MALE | scurfy sida |
| seep-willow | Asteraceae | Baccharis | salicina | BASA | |
| shaggy dwarf morning-glory | Convolvulaceae | Evolvulus | nuttallianus | EVNU | zig-zag morning glory |
| shaggyfruit pepperweed | Brassicaceae | Lepidium | lasiocarpum | LELA | hairy pepperweed |
| shortcrown milkweed | Asclepiadaceae | Asclepias | brachystephana | ASBR | |
| shortstem lupine | Fabaceae | Lupinus | brevicaulis | LUBR | |
| shrubby purslane | Portulaceae | Portulaca | suffrutescens | POSU | |
| sicklepod holdback | Fabaceae | Hoffmannseggia | drepanocarpa | HODR | |
| sideoats grama | Poaceae | Bouteloua | curtipendula | BOCU | |
| sideoats grama | Poaceae | Bouteloua | curtipendula | BOCU | |
| silkcotton purslane | Portulaceae | Portulaca | halimoides | POHA | small-flowered purslane |
| silky sophora | Fabaceae | Sophora | nuttalliana | SONU | |
| silver beardgrass | Poaceae | Bothriochloa | laguroides | BOLA | silver bluestem |
| silver dwarf morning-glory | Convolvulaceae | Evolvulus | sericeus | EVSE | |
| silverleaf nightshade | Solanaceae | Solanum | elaeagnifolium | SOEL | |
| silverpuffs | Asteraceae | Uropappus | lindleyi | URLI | |
| sixweeks fescue | Poaceae | Vulpia | octoflora | VUOC | |
| sixweeks grama | Poaceae | Bouteloua | barbata | BOBA | |
| sixweeks threeawn | Poaceae | Aristida | adscensionis | ARAD | |
| skunkbush sumac | Anacardiaceae | Rhus | trilobata | RHTR | |
| skyblue phacelia | Hydrophyllaceae | Phacelia | coerulea | PHCO | |
| sleepy silene | Caryophyllaceae | Silene | antirrhina | SIAN | sleepy catchfly |
| slender dwarf morning-glory | Convolvulaceae | Evolvulus | alsinoides | EVAL | |
| slender janusia | Malpighiaceae | Janusia | gracilis | JAGR | propeller plant |
| slender muhly | Poaceae | Muhlenbergia | tenuifolia | MUTE | mesa muhly |
| slender spine-aster | Asteraceae | Xanthisma | gracile | XAGR | |
| slim tridens | Poaceae | Tridens | muticus | TRMU | |
| slim-lobe bahia | Asteraceae | Bahia | biternata | BABI | |
| slimleaf plainsmustard | Brassicaceae | Schoenocrambe | linearifolia | SCLI | pink windmills |
| slimlobe globeberry | Cucurbitaceae | Ibervillea | tenuisecta | IBTE | deer apples |
| slimstalk spiderling | Nyctaginaceae | Boerhavia | gracillima | BOGR | bush spiderling |
| small matweed | Amaranthaceae | Guilleminea | densa | GUDE | |
| small rocklettuce | Asteraceae | Pinaropappus | parvus | PIPA | dwarf rock-lettuce |
| small wirelettuce | Asteraceae | Stephanomeria | exigua | STEX | twiggy wire-lettuce |
| smallflower desert-chicory | Asteraceae | Pyrrhopappus | pauciflorus | PYPA | texas false dandelion |
| smallflowered milkvetch | Fabaceae | Astragalus | nuttallianus | ASNU | nuttal’s milkvetch |
| smooth barley | Poaceae | Hordeum | murinum | HOMU | mouse barley |
| snakecotton | Amaranthaceae | Froelichia | floridana | FRFL | |
| snowball sand verbena | Nyctaginaceae | Abronia | fragrans | ABFR | |
| soap-tree yucca; palmilla | Agavaceae | Yucca | elata | YUEL | |
| Sonoran sandmat | Euphorbicaeae | Chamaesyce | micromera | CHMI | desert spurge |
| Sonoran scrub oak | Fagaceae | Quercus | turbinella | QUTU | desert scrub oak |
| southwestern needlegrass | Poaceae | Achnatherum | eminens | ACEM | |
| southwestern prickly poppy | Papaveraceae | Argemone | pleiacantha | ARPL | |
| southwestern rabbitbrush | Asteraceae | Ericameria | pulchella | ERPU | |
| southwestern wild carrot | Apiaceae | Daucus | pusillus | DAPU | |
| spear globemallow | Malvaceae | Sphaeralcea | hastulata | SPHA | wrinkled globemallow |
| spider milkweed | Asclepiadaceae | Asclepias | asperula | ASAS | |
| spidergrass | Poaceae | Aristida | ternipes | ARTE | |
| spidergrass | Poaceae | Aristida | ternipes | ARTE | hook threeawn |
| spike burgrass | Poaceae | Tragus | berteronianus | TRBE | |
| spike dropseed | Poaceae | Sporobolus | contractus | SPCO | |
| spiny cocklebur | Asteraceae | Xanthisma | spinulosum | XASP | lacy spine-aster |
| spiny sowthistle | Asteraceae | Sonchus | asper | SOAS | prickly sow-thistle |
| spinystar | Cactaceae | Escobaria | vivipara | COVI | beehive cactus |
| splitleaf brickellbush | Asteraceae | Brickellia | laciniata | BRLA | |
| spreading alkaliweed | Convolvulaceae | Cressa | truxillensis | CRTR | alkali weed |
| spreading amaranth | Amaranthaceae | Amaranthus | crassipes | AMCR | bony pigweed |
| spreading chinchweed | Asteraceae | Pectis | prostrata | PEPR | dwarf chinchweed |
| spreading fanpetals | Malvaceae | Sida | abutifolia | SIAB | spreading sida |
| spreading fleabane | Asteraceae | Erigeron | divergens | ERDI | |
| spreading moonpod | Nyctaginaceae | Acleisanthes | diffusus | ACDI | |
| spring flax | Linaceae | Linum | vernale | LIVE | spring flax |
| Springfield’s beardgrass | Poaceae | Bothriochloa | springfieldii | BOSP | springfield bluestem |
| sticky sprangletop | Poaceae | Leptochloa | viscida | LEVI | gum sprangletop |
| stinging serpent | Loasaceae | Cevallia | sinuata | CESI | stinging cevallia |
| stinkgrass | Poaceae | Eragrostis | cilianensis | ERCI | |
| strawberry hedgehog cactus | Cactaceae | Echinocereus | stramineus | ECST | |
| streambed bristlegrass | Poaceae | Setaria | leucopila | SELE | plains bristlegrass |
| stretchberry | Oleaceae | Forestiera | pubescens | FOPU | New Mexico desert olive |
| tanglehead | Poaceae | Heteropogon | contortus | HECO | |
| tanseyleaf tansyaster | Asteraceae | Machaeranthera | tanacetifolia | MATA | tahoka daisy |
| tapertip cupgrass | Poaceae | Eriochloa | acuminata | ERAC | |
| tarbush | Asteraceae | Flourensia | cernua | FLCE | |
| tarragon | Asteraceae | Artemisia | dracunculus | ARDR | |
| Texas bindweed | Convolvulaceae | Convolvulus | equitans | COEQ | hairy bindweed |
| Texas blueweed | Asteraceae | Helianthus | ciliaris | HECI | blueweed |
| Texas mulberry | Moraceae | Morus | microphylla | MOMI | |
| Texas selenia | Brassicaceae | Selenia | dissecta | SEDI | |
| Texas stork’s bill | Geraniaceae | Erodium | texanum | ERTE | Texas filaree |
| texas toadflax | Plantaginaceae | Nuttallanthus | texanus | NUTE | |
| thickleaf drymary | Caryophyllaceae | Drymaria | pachyphylla | DRPA | |
| thicksepal cryptantha | Boraginaceae | Cryptantha | crassisepala | CRCR | |
| thin paspalum | Poaceae | Paspalum | setaceum | PASE | sand paspalum |
| threadleaf glowort | Asteraceae | Sartwellia | flaveriae | SAFL | sartwellia |
| threadleaf ragwort | Asteraceae | Senecio | flaccidus | SEFL | threadleaf groundsel |
| threadleaf snakeweed | Asteraceae | Gutierrezia | microcephala | GUMI | |
| threadstem carpetweed | Molluginaceae | Mollugo | cerviana | MOCE | |
| threadstem sandmat | Euphorbicaeae | Chamaesyce | revoluta | CHRE | curl-leaf spurge |
| thurber’s stemsucker | Rafflesiaceae | Pilostyles | thurberi | PITH | |
| thymeleaf sandmat | Euphorbicaeae | Chamaesyce | serpyllifolia | CHSE | thymeleaf spurge |
| tobosa grass | Poaceae | Pleuraphis | mutica | PLMU | |
| toothleaf golden-eye | Asteraceae | Viguiera | dentata | VIDE | golden-eye |
| torrey’s jointfir | Ephedraceae | Ephedra | torreyana | EPTO | torrey’s ephedra |
| torrey’s wolfberry | Solanaceae | Lycium | torreyi | LYTO | |
| touristplant | Brassicaceae | Dimorphocarpa | wislizenii | DIWI | spectacle-pod |
| trailing krameria | Krameriaceae | Krameria | lanceolata | KRLA | three fans |
| trailing windmills | Nyctaginaceae | Allionia | incarnata | ALIN | |
| Trans-Pecos morning-glory | Convolvulaceae | Ipomoea | cristulata | IPCR | scarlet creeper |
| Trans-Pecos poreleaf | Asteraceae | Porophyllum | scoparium | POSC | porophyllum |
| Trans-Pecos thimblehead | Asteraceae | Hymenothrix | wislizenii | HYWI | hymenothrix |
| tree cholla | Cactaceae | Cylindropuntia | imbricata | CYIM | |
| tufted evening primrose | Onagraceae | Oenothera | caespitosa | OECA | |
| tufted lovegrass | Poaceae | Eragrostis | pectinacea | ERPE | carolina lovegrass |
| tule | Cyperaceae | Schoenoplectus | acutus | SCAC | hardstem bulrush |
| tulip pricklypear | Cactaceae | Opuntia | phaeacantha | OPPH | New Mexico prickly pear |
| tumbleweed amaranth | Amaranthaceae | Amaranthus | albus | AMAL | |
| tumbling saltweed | Chenopodiaceae | Atriplex | rosea | ATRO | tumbling orache |
| turkey tangle fogfruit | Verbenaceae | Phyla | nodiflora | PHNO | |
| turpentine bush | Asteraceae | Ericameria | laricifolia | ERLA | |
| twin-leaf senna | Fabaceae | Senna | bauhinioides | SEBA | |
| upright prairie coneflower | Asteraceae | Ratibida | columnifera | RACO | mexican hat; prairie coneflower |
| velvet leaf senna | Fabaceae | Senna | lindheimeriana | SELI | lindheimer’s senna |
| velvetweed | Onagraceae | Oenothera | curtiflora | GAPA | lizard tail |
| vine mesquite | Poaceae | Panicum | obtusum | PAOB | |
| viscid acacia | Fabaceae | Acacia | neovernicosa | ACNE | eastern whitethorn |
| walkingstick cactus | Cactaceae | Cylindropuntia | spinosior | CYSP | cane cholla |
| Warnock’s snakewood | Rhamnaceae | Condalia | warnockii | COWA | crucillo |
| warty caltrop | Zygophyllaceae | Kallstroemia | parviflora | KAPA | warty carpetweed |
| wedgeleaf draba | Brassicaceae | Draba | cuneifolia | DRCU | whitlow-grass |
| weeping lovegrass | Poaceae | Eragrostis | curvula | ERCU | boer lovegrass |
| weeping lovegrass | Poaceae | Eragrostis | curvula | ERCU | |
| western fleabane | Asteraceae | Erigeron | bellidiastrum | ERBE | |
| western honey mesquite | Fabaceae | Prosopis | glandulosa | PRGL | |
| western soapberry | Sapindaceae | Sapindus | drummondii | SADR | |
| western tansymustard | Brassicaceae | Descurainia | pinnata | DEPI | |
| western wheatgrass | Poaceae | Elymus | smithii | ELSM | |
| western white clematis | Ranunculaceae | Clematis | ligusticifolia | CLLI | western virgin’s bower |
| white fishhook cactus | Cactaceae | Echinomastus | intertextus | ECIN | woven-spine pineapple cactus |
| white ratany | Krameriaceae | Krameria | grayi | KRGR | |
| White Sands fanmustard | Brassicaceae | Nerisyrenia | linearifolia | NELI | bicolored mustard |
| white tackstem | Asteraceae | Calycoseris | wrightii | CAWR | |
| whitemargin sandmat | Euphorbicaeae | Chamaesyce | albomarginata | CHAL | |
| whitemouth dayflower | Commelinaceae | Commelina | erecta | COER | |
| whitest evening primrose | Onagraceae | Oenothera | albicaulis | OEAL | prairie evening primrose |
| whitestem blazingstar | Loasaceae | Mentzelia | albicaulis | MEAL | whitestem stickleaf |
| whitethorn acacia | Fabaceae | Acacia | constricta | ACCO | |
| whitethorn acacia | Fabaceae | Acacia | constricta | ACCO | spineless western whitethorn |
| wild oats | Poaceae | Avena | fatua | AVFA | |
| willow baccharis | Asteraceae | Baccharis | salicifolia | BAGL | |
| winged pigweed | Chenopodiaceae | Cycloloma | atriplicifolium | CYAT | |
| wingnut cryptantha | Boraginaceae | Cryptantha | pterocarya | CRPT | |
| wingpod purslane | Portulaceae | Portulaca | umbraticola | POUM | chinese hats |
| winterfat | Chenopodiaceae | Krascheninnikovia | lanata | KRLA | |
| witchgrass | Poaceae | Panicum | capillare | PACA | |
| woody crinklemat | Boraginaceae | Tiquilia | canescens | TICA | oreja de perro (dog ears) |
| woolly paperflower | Asteraceae | Psilostrophe | tagetina | PSTA | paperflower |
| woolly plantain | Plantaginaceae | Plantago | patagonica | PLPA | wooly indian wheat |
| woolly prairie clover | Fabaceae | Dalea | lanata | DALA | spreading dalea |
| wooly locoweed | Fabaceae | Astragalus | mollissimus | ASMO | |
| wooly marsh-elder | Asteraceae | Leuciva | dealbata | LEDE | |
| wooton’s threeawn | Poaceae | Aristida | pansa | ARPA | |
| wooton’s threeawn | Poaceae | Aristida | pansa | ARPA | |
| Wright’s beebrush | Verbenaceae | Aloysia | wrightii | ALWR | beebush; oreganillo |
| Wright’s deervetch | Fabaceae | Lotus | wrightii | LOWR | wright’s lotus |
| Wright’s nipple cactus | Cactaceae | Mammillaria | wrightii | MAWR | wright’s fishhook cactus |
| wright’s silktassle | Garryaceae | Garrya | wrightii | GAWR | |
| wright’s thelypody | Brassicaceae | Thelypodium | wrightii | THWR | |
| wright’s threeawn | Poaceae | Aristida | purpurea | ARPU | |
| yellow bluestem | Poaceae | Bothriochloa | ischaemum | BOIS | |
| yellow foxtail | Poaceae | Setaria | pumila | SEPU | yellow bristlegrass |
| yellow indian mallow | Malvaceae | Abutilon | malacum | ABMA | |
| yellow nut-sedge | Cyperaceae | Cyperus | esculentus | CYES | |
| yellow trumpetbush | Bignoniaceae | Tecoma | stans | TEST | trumpet-flower |
| yellowspine thistle | Asteraceae | Cirsium | ochrocentrum | CIOC | |
| yerba de pasmo | Asteraceae | Baccharis | pteronioides | BAPT | |
| yerba-mansa | Saururaceae | Anemopsis | californica | ANCA | |
| Yuma sandmat | Euphorbicaeae | Chamaesyce | setiloba | CHST | shaggy spurge |
| zephyr-lily | Amaryllidaceae | Zephyranthes | longifolia | ZELO | |
