Explore Plants
Complete list of species
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| scientific name | common name(s) | image gallery |
| Argemone mexicana | Mexican pricklypoppy Mexican prickly poppy Yellow pricklypoppy | |
| Argemone munita | Flatbud prickly poppy Flatbud pricklypoppy | |
| Argemone pleiacantha | Southwestern Prickly-poppy Bluestem Pricklepoppy | |
| Argemone polyanthemos | Annual pricklepoppy Bluestem pricklepoppy Bluestem prickly poppy Crested pricklypoppy Pricklypoppy Thistle poppy White prickly poppy White pricklypoppy | |
| Argemone sanguinea | Red prickly poppy Red pricklypoppy Rose prickly poppy | |
| Argemone squarrosa | Hedgehog pricklypoppy | |
| Argentina anserina | Silverweed cinquefoil | |
| Argentina egedii | Pacific silverweed | |
| Argentina egedii ssp. egedii | Pacific silverweed Beach Silverweed | |
| Argentina egedii ssp. groenlandica | Pacific silverweed | |
| Argyrochosma dealbata | False Cloak Fern Powdery Cloak Fern Powdery false cloak fern | |
| Argyroxiphium sandwicense | Hawai'i silversword | |
| Argythamnia aphoroides | Hill Country silverbush | |
| Argythamnia humilis | Low silverbush | |
| Argythamnia humilis var. humilis | Low Silverbush Low Wild Mercury | |
| Argythamnia mercurialina | Tall silverbush Tall wildmercury | |
| Argythamnia mercurialina var. mercurialina | Tall Silverbush Tall Wild Mercury Tall Ditaxis | |
| Argythamnia mercurialina var. pilosissima | Tall silverbush | |
| Argythamnia neomexicana | New Mexico Silverbush | |
| Argythamnia simulans | Plateau silverbush Tall wild-mercury | |
| Ariocarpus fissuratus | Chautle livingrock | |
| Arisaema dracontium | Green dragon Dragonroot Greendragon | |
| Arisaema triphyllum | Jack in the pulpit Indian jack in the pulpit Jack-in-the-pulpit | |
| Arisaema triphyllum ssp. pusillum | Jack in the pulpit | |
| Arisaema triphyllum ssp. quinatum | Five-leaved Jack-in-the-pulpit Jack in the pulpit Indian turnip | |
| Arisaema triphyllum ssp. stewardsonii | Jack in the pulpit | |
| Arisaema triphyllum ssp. triphyllum | Jack in the pulpit | |
| Aristida beyrichiana | Beyrich threeawn Wiregrass | |
| Aristida lanosa | Woollysheath Threeawn Woolly Three-awn | |
| Aristida longespica | Slimspike threeawn Kearney's three-awn red three-awn slender three-awn | |
| Aristida oligantha | Prairie threeawn Oldfield (Prairie) 3-awn Oldfield threeawn | |
| Aristida purpurascens var. tenuispica | Arrowfeather threeawn Hillsboro Threeawn Hillsborough Threeawn | |
| Aristida purpurea | Purple threeawn Purple 3-awn Purple three-awn Red threeawn | |
| Aristida purpurea var. longiseta | Red three-awn Fendler three-awn | |
| Aristida purpurea var. nealleyi | Blue threeawn | |
| Aristida purpurea var. purpurea | Purple threeawn Red threeawn | |
| Aristida stricta | Pineland threeawn Wiregrass | |
| Aristolochia californica | California dutchman's pipe | |
| Aristolochia coryi | Cory's dutchman's pipe | |
| Aristolochia erecta | Swanflower | |
| Aristolochia macrophylla | Pipevine | |
| Aristolochia pentandra | Marsh's dutchman's pipe | |
| Aristolochia reticulata | Texas dutchman's pipe | |
| Aristolochia serpentaria | Virginia snakeroot Virginia dutchmanspipe | |
| Aristolochia tomentosa | Woolly dutchman's pipe Common dutchmanspipe | |
| Aristolochia watsonii | Indianroot Watson's Dutchman's-pipe | |
| Armeria maritima | Thrift seapink | |
| Armeria maritima ssp. sibirica | Siberian sea thrift | |
| Arnica acaulis | Common leopardbane | |
| Arnica amplexicaulis | Clasping arnica | |
| Arnica angustifolia | Alpine arnica Narrowleaf arnica | |
| Arnica angustifolia ssp. angustifolia | Narrowleaf arnica | |
| Arnica chamissonis | Chamisso arnica | |
| Arnica chamissonis ssp. foliosa | Chamisso arnica | |
| Arnica cordifolia | Heart-leaf leopardbane Heartleaf arnica | |
| Arnica frigida | Frigid arnica Lake Louise arnica Snow arnica Snow leopardbane | |
| Arnica fulgens | Foothill arnica | |
| Arnica lanceolata | Lanceleaf arnica | |
| Arnica latifolia | Broadleaf arnica Daffodil leopardbane Mountain arnica | |
| Arnica lessingii | Nodding arnica | |
| Arnica lonchophylla | Longleaf arnica | |
| Arnica lonchophylla ssp. lonchophylla | Longleaf arnica Spear-leaved Arnica | |
| Arnica longifolia | Spearleaf arnica | |
| Arnica mollis | Hairy arnica | |
| Arnica parryi | Parry's arnica | |
| Arnica rydbergii | Rydberg's arnica | |
| Arnoglossum atriplicifolium | Pale Indian plaintain | |
| Arnoglossum ovatum | Ovateleaf cacalia | |
| Arnoglossum plantagineum | Groovestem Indian plaintain Indian plantain Prairie plantain Prairie Indian plantain | |
| Artemisia californica | Coastal sagebrush California sagebrush | |
| Artemisia campestris | Field sagewort | |
| Artemisia campestris ssp. borealis | Field sagewort Northern Wormwood | |
| Artemisia campestris ssp. caudata | Field sagewort | |
| Artemisia cana | Silver sagebrush Coaltown sagebrush Dwarf sagebrush Hoary sagebrush Silvery sagebrush | |
| Artemisia douglasiana | Douglas mugwort Douglas' sagewort | |
| Artemisia dracunculus | Tarragon | |
| Artemisia filifolia | Sand sagebrush Silver sagebrush Silvery wormwood Sand sage | |
| Artemisia frigida | Prairie sagewort Prairie sagebrush Fringed sage Pasture sage | |
| Artemisia ludoviciana | Louisiana artemisia Louisiana sage White sage Prairie sage Silver sage White sagebrush Louisiana wormwood Silver wormwood Louisiana sagewort Gray sagewort Cudweed sagewort Mugwort wormwood | |
| Artemisia ludoviciana ssp. albula | White Sagebrush White Wormwood | |
| Artemisia nova | Black sagebrush | |
| Artemisia palmeri | San Diego sagebrush San Diego sagewort | |
| Artemisia pycnocephala | Beach sagebrush Beach wormwood Sand hill sage | |
| Artemisia stelleriana | Dusty Miller Oldwoman | |
| Artemisia tilesii ssp. elatior | Tilesius' wormwood Aleutian Mugwort | |
| Artemisia tridentata | Big sagebrush Great Basin sagebrush | |
| Artemisia vulgaris | Common wormwood Mugwort | |
| Aruncus dioicus | Bride's feathers Goat's beard | |
| Aruncus dioicus var. acuminatus | Bride's feathers Sylvan Goatsbeard | |
| Arundinaria gigantea | Giant cane | |
| Asarum canadense | Canadian wild ginger Wild ginger | |
| Asarum caudatum | British Columbia wild ginger Long-tail wild ginger | |
| Asarum hartwegii | Hartweg's wild ginger | |
| Asclepias albicans | White-stemmed Milkweed Whitestem milkweed | |
| Asclepias amplexicaulis | Clasping milkweed | |
| Asclepias arenaria | Sand milkweed | |
| Asclepias asperula | Spider milkweed Antelope horns Green-flowered milkweed Spider antelope-horns | |
| Asclepias asperula ssp. capricornu | Antelopehorns Antelope horns | |
| Asclepias brachystephana | Bract milkweed | |
| Asclepias californica | California milkweed | |
| scientific name | common name(s) | image gallery |
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