Complete list of species
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| scientific name | common name(s) | image gallery |
| Agave toumeyana var. bella | Toumey's Century Plant Fairy-ring Agave | |
| Agave toumeyana var. toumeyana | Toumey Agave Toumey's Century Plant | |
| Agave univittata | Thorncrest Century Plant Maguey Mezortillo | |
| Agave utahensis | Utah Agave | |
| Agave utahensis var. eborispina | Ivory-spined Agave Utah Agave | |
| Agave utahensis var. kaibabensis | Kaibab Agave | |
| Agave utahensis var. nevadensis | Nevada Agave | |
| Agave utahensis var. utahensis | Utah Agave | |
| Agave ×ajoensis | Ajo Agave | |
| Agave ×arizonica | Arizona Agave Arizona Century Plant | |
| Ageratina altissima | White Snakeroot | |
| Ageratina altissima var. altissima | White Snakeroot | |
| Ageratina altissima var. angustata | White Snakeroot | |
| Ageratina altissima var. roanensis | Appalachian White Snakeroot Appalachian Tall Boneset | |
| Ageratina aromatica | Lesser Snakeroot Small-leaf Snakeroot Small-leaved Snakeroot Small White Snakeroot Aromatic Snakeroot Fragrant Snakeroot Aromatic Thoroughwort Fragrant Thoroughwort | |
| Ageratina aromatica var. aromatica | Lesser Snakeroot Small-leaf Snakeroot Small-leaved Snakeroot Small White Snakeroot Aromatic Snakeroot Fragrant Snakeroot Aromatic Thoroughwort Fragrant Thoroughwort | |
| Ageratina aromatica var. incisa | Lesser Snakeroot Small-leaved Snakeroot | |
| Ageratina havanensis | Shrubby Boneset White Mistflower White Shrub Mistflower Havana Snakeroot | |
| Ageratina herbacea | Fragrant Snakeroot | |
| Ageratina jucunda | Hammock Snakeroot | |
| Ageratina lemmonii | Lemmon's Snakeroot | |
| Ageratina luciae-brauniae | Lucy Braun's Snakeroot Rockhouse White Snakeroot | |
| Ageratina occidentalis | Western Snakeroot Western Thoroughwort | |
| Ageratina paupercula | Santa Rita Snakeroot | |
| Ageratina rothrockii | Rothrock's Snakeroot | |
| Ageratina shastensis | Shasta Snakeroot Mt. Shasta Snakeroot | |
| Ageratina wrightii | White Mistflower Wright's Snakeroot White Boneset White Ageratum | |
| Ageratum corymbosum | Flat-Top Whiteweed | |
| Ageratum littorale | Cape Sable Whiteweed | |
| Agnorhiza bolanderi | Bolander's Mule-ears Bolander's Mule Ears | |
| Agnorhiza elata | Hall's Mule-ears Hall's Mule Ears | |
| Agnorhiza invenusta | Coville's Mule-ears Coville's Mule Ears Rayless Mule Ears | |
| Agnorhiza ovata | Southern Mule-ears Southern Mule Ears | |
| Agnorhiza reticulata | El Dorado Mule-ears El Dorado Mule Ears El Dorado County Mule Ears | |
| Agoseris apargioides | Woolly Goat Chicory Seaside Agoseris Seaside False-dandelion Coast Dandelion | |
| Agoseris apargioides var. apargioides | Woolly Goat Chicory Seaside Agoseris Seaside False-dandelion Coast Dandelion | |
| Agoseris apargioides var. eastwoodiae | Woolly Goat Chicory Beach Dandelion Eastwood's Seaside Agoseris Point Reyes Agoseris | |
| Agoseris apargioides var. maritima | Woolly Goat Chicory Oregon Agoseris Coast Dandelion | |
| Agoseris aurantiaca | Orange Agoseris | |
| Agoseris aurantiaca var. aurantiaca | Orange Agoseris | |
| Agoseris aurantiaca var. purpurea | Orange Agoseris Colorado Plateau Agoseris | |
| Agoseris elata | Tall Agoseris Willamette Agoseris | |
| Agoseris glauca | Pale Agoseris Pale Mountain Dandelion False Dandelion | |
| Agoseris glauca var. agrestis | Pale Agoseris Field Short Beaked Agoseris | |
| Agoseris glauca var. cronquistii | Pale Agoseris Pale Goat Chicory | |
| Agoseris glauca var. dasycephala | Pale Agoseris Arctic Agoseris Alpine Agoseris Pale Goat Chicory | |
| Agoseris glauca var. glauca | Pale Agoseris Short Beaked Agoseris | |
| Agoseris glauca var. laciniata | False Agoseris False Dandelion Lace Leaved Short Beaked Agoseris | |
| Agoseris glauca var. monticola | Pale Agoseris Mountain Agoseris Short Beaked Agoseris Mountain Short Beaked Agoseris | |
| Agoseris grandiflora | Bigflower Agoseris Grassland Agoseris | |
| Agoseris heterophylla | Annual Agoseris | |
| Agoseris heterophylla var. crenulata | Annual Agoseris California Agoseris Mountain Dandelion | |
| Agoseris heterophylla var. heterophylla | Annual Agoseris California Agoseris Mountain Dandelion | |
| Agoseris heterophylla var. turgida | Annual Agoseris California Agoseris Mountain Dandelion | |
| Agoseris lackschewitzii | Mill Creek Agoseris | |
| Agoseris retrorsa | Spearleaf Agoseris Spear Leaved Agoseris Spearleaf Mountain Dandelion | |
| Agoseris ×dasycarpa | Agoseris | |
| Agoseris ×montana | Agoseris | |
| Agrimonia gryposepala | Tall Hairy Agrimony Agrimony | |
| Agrimonia incisa | Incised Agrimony | |
| Agrimonia microcarpa | Smallfruit Agrimony | |
| Agrimonia parviflora | Harvest Lice Small-flowered Agrimony Southern Agrimony Swamp Agrimony | |
| Agrimonia pubescens | Downy Agrimony Soft Agrimony Hairy Agrimony | |
| Agrimonia rostellata | Beaked Agrimony | |
| Agrimonia striata | Roadside Agrimony | |
| ×Agroelymus adamsii | Agroelymus | |
| ×Agroelymus bowdenii | Agroelymus | |
| Agrostis aequivalvis | Arctic Bent Arctic Bent Grass Arctic Bentgrass | |
| Agrostis blasdalei | Blasdale Bentgrass Blasdale's Bent Blasdale's Bent Grass | |
| Agrostis clavata | Clavate Bent Clavate Bent Grass Clavate Bentgrass | |
| Agrostis clivicola | Coastal Bluff Bent Coastal Bluff Bent Grass Coastal Bluff Bentgrass | |
| Agrostis clivicola var. clivicola | Coastal Bluff Bent Coastal Bluff Bent Grass Coastal Bluff Bentgrass | |
| Agrostis clivicola var. punta-reyesensis | Point Reyes Bent Point Reyes Bent Grass Point Reyes Bentgrass | |
| Agrostis densiflora | California Bent California Bent Grass California Bentgrass | |
| Agrostis elliottiana | Elliott's Bentgrass | |
| Agrostis exarata | Spike Bentgrass Spiked Bent Spike Red Top | |
| Agrostis hallii | Hall Redtop Hall's Bent Hall's Bent Grass Hall's Bentgrass | |
| Agrostis hendersonii | Henderson's Bent Henderson's Bent Grass Henderson's Bentgrass | |
| Agrostis hooveri | Hoover's Bent Hoover's Bent Grass Hoover's Bentgrass | |
| Agrostis howellii | Howell's Bent Howell's Bent Grass Howell's Bentgrass | |
| Agrostis humilis | Alpine Bent Alpine Bent Grass Alpine Bentgrass Mountain Bent Grass | |
| Agrostis hyemalis | Winter Bentgrass | |
| Agrostis idahoensis | Colonial Bent Grass Idaho Bent Idaho Bentgrass Idaho Redtop | |
| Agrostis lacuna-vernalis | Vernal Pool Bent Vernal Pool Bent Grass Vernal Pool Bentgrass | |
| Agrostis mertensii | Northern Bentgrass | |
| Agrostis microphylla | Little Leaf Bent Grass Small Lleaf Bent Grass Small-leaf Bent Small-leaf Bentgrass | |
| Agrostis oregonensis | Oregon Bent Oregon Bent Grass Oregon Bentgrass Oregon Redtop | |
| Agrostis pallens | Dune Bent Dune Bent Grass Leafy Bent Grass Seashore Bentgrass | |
| Agrostis pauzhetica | Thermal Bent | |
| Agrostis perennans | Upland Bentgrass Autumn Bentgrass | |
| Agrostis rossiae | Ross' Bent Ross' Bent Grass Ross' Bentgrass | |
| Agrostis sandwicensis | Hawaii Bent Hawaii Bent Grass Hawaii Bentgrass | |
| Agrostis scabra | Rough Bentgrass Rough Bent Ticklegrass Fly-away Grass | |
| Agrostis variabilis | Mountain Bent Mountain Bent Grass Mountain Bentgrass Mountain Redtop | |
| Agrostis vinealis | Brown Bent Brown Bent Grass Brown Bentgrass | |
| Agrostis vinealis ssp. vinealis | Brown Bent Brown Bent Grass Brown Bentgrass | |
| Alchemilla alpina | Alpine Lady's Mantle | |
| Alchemilla filicaulis | Thinstem Lady's Mantle | |
| Alchemilla filicaulis ssp. filicaulis | Thin-stem Lady's Mantle Thread-stemmed Lady's Mantle | |
| Alchemilla filicaulis ssp. vestita | Thinstem Lady's Mantle | |
| scientific name | common name(s) | image gallery |
