Names beginning with A: absinthe, adder's-mouth, adder's-tongue, agaric, agaricus, Agaricus, agaricus, agarikon, agoseris, agrimony, agrocybe, alder, Alexanders, alfalfa, alkali grass, alkali-mallow, alkaligrass, alkanet, allseed, almond, alpine-azalea, alpine-laurel, alpinegold, alumroot, alyssum, amadou, amanita, amaranth, ammania, amsinckia, Anellaria, anemone, angel's-wings, angel-of-death, angelica, ankle-aster, Annie, antelope-brush, apargidium, apple, archangel, armillaria, Armillaria, arnica, arrow-grass, arrowhead, artemisia, artichoke, arugula, arum, ash, asparagus, aspen, asphodel, aster, avens, awl-wort, azalea
Absinthe
Adder's-mouth
African adder's-mouth (Strigosella africana) – 11 photos
white adder's-mouth (Malaxis monophyllos) – 2 photos
Adder's-tongue
adder's-tongue (Erythronium) – 1 photo
northern adder's-tongue (Ophioglossum pusillum) – 13 photos
Agaric
banded agaric (Agaricus bitorquis) – 3 photos
fly agaric (Amanita muscaria) – 18 photos
forest agaric (Agaricus silvicola) – 13 photos
giant agaric (Agaricus augustus) – 15 photos
horse agaric (Agaricus augustus) – 15 photos
orange moss agaric (Rickenella fibula) – 3 photos
spring agaric (Agaricus bitorquis) – 3 photos
sylvan agaric (Agaricus silvicola) – 13 photos
urban agaric (Agaricus bitorquis) – 3 photos
wine-colored agaric (Agaricus subrutilescens) – 14 photos
Agaricus
amber-staining agaricus (Agaricus albolutescens) – 1 photo
anise agaricus (Agaricus micromegethus) – 6 photos
diminutive agaricus (Agaricus diminutivus) – 4 photos
felt-ringed agaricus (Agaricus hondensis) – 13 photos
horse agaricus (Agaricus arvensis) – 6 photos
meadow agaricus (Agaricus campestris) – 9 photos
mountain gastroid agaricus (Agaricus inapertus (Endotychum depressum)) – 1 photo
prince agaricus (Agaricus augustus) – 15 photos
purple agaricus (Agaricus purpurellus) – 4 photos
Agaricus
red-gilled Agaricus (Melanophyllum haematospermum) – 3 photos
Agaricus
red-staining agaricus (Agaricus silvaticus) – 2 photos
salt-loving agaricus (Agaricus bernardii) – 3 photos
small slender agaricus (Agaricus comtulus) – 4 photos
wine agaricus (Agaricus semotus cf.) – 3 photos
wine-colored agaricus (Agaricus subrutilescens) – 14 photos
woodland agaricus (Agaricus silvicola) – 13 photos
woods agaricus (Agaricus silvicola) – 13 photos
woolly-stemmed agaricus (Agaricus subrutilescens) – 14 photos
Agarikon
Agoseris
alpine lake agoseris (Nothocalais alpestris) – 26 photos
annual agoseris (Agoseris heterophylla) – 32 photos
large flowered agoseris (Agoseris grandiflora var. grandiflora) – 43 photos
large-flowered agoseris (Agoseris grandiflora) – 24 photos
mountain agoseris (Agoseris monticola) – 18 photos
orange agoseris (Agoseris aurantiaca) – 31 photos
orange agoseris (Agoseris aurantiaca var. aurantiaca) – 24 photos
pale agoseris (Agoseris glauca) – 28 photos
pale agoseris (Agoseris glauca var. dasycephala) – 51 photos
pink agoseris (Agoseris aurantiaca var. carnea) – 20 photos
Puget Sound agoseris (Agoseris grandiflora var. leptophylla) – 10 photos
seaside agoseris (Agoseris apargioides var. maritima) – 9 photos
short-beaked agoseris (Agoseris glauca) – 28 photos
Sierra Nevada agoseris (Agoseris monticola) – 18 photos
slender agoseris (Agoseris aurantiaca var. aurantiaca) – 24 photos
spear leaved agoseris (Agoseris retrorsa) – 18 photos
steppe agoseris (Agoseris parviflora Soojeong Shin) – 1 photo
tall agoseris (Agoseris ×elata) – 25 photos
Agrimony
tall hairy agrimony (Agrimonia gryposepala) – 2 photos
Agrocybe
common agrocybe (Agrocybe pediades) – 3 photos
hemispheric agrocybe (Agrocybe pediades) – 3 photos
spring agrocybe (Agrocybe praecox) – 6 photos
Alder
Black alder (Alnus glutinosa) – 4 photos
European alder (Alnus glutinosa) – 4 photos
green alder (Alnus alnobetula) – 40 photos
mountain alder (Alnus alnobetula) – 20 photos
mountain alder (Alnus alnobetula ssp. sinuata) – 45 photos
mountain alder (Alnus incana) – 18 photos
mountain alder (Alnus incana ssp. tenuifolia) – 38 photos
white alder (Alnus rhombifolia) – 61 photos
Alexanders
heart-leaved Alexanders (Zizia aptera) – 17 photos
Alfalfa
yellow alfalfa (Medicago sativa ssp. falcata) – 1 photo
Alkali grass
Nuttall's alkali grass (Puccinellia nuttalliana) – 4 photos
Alkali-mallow
alkali-mallow (Malvella leprosa) – 4 photos
Alkaligrass
European alkaligrass (Puccinellia distans) – 14 photos
Nootka alkaligrass (Puccinellia nutkaensis) – 8 photos
shining alkaligrass (Puccinellia nutkaensis) – 8 photos
weak alkaligrass (Torreyochloa pallida var. pauciflora) – 15 photos
weeping alkaligrass (Puccinellia distans) – 14 photos
Alkanet
common alkanet (Anchusa officinalis) – 40 photos
green alkanet (Pentaglottis sempervirens) – 33 photos
Italian alkanet (Anchusa azurea) – 16 photos
Allseed
fourleaf allseed (Polycarpon tetraphyllum) – 7 photos
Almond
Alpine-azalea
alpine-azalea (Kalmia procumbens) – 5 photos
Alpine-laurel
alpine-laurel (Kalmia microphylla var. microphylla) – 3 photos
Alpinegold
alpine alpinegold (Hulsea algida) – 2 photos
small alpinegold (Hulsea nana) – 29 photos
Alumroot
alpine alumroot (Heuchera glabra) – 21 photos
crevice alumroot (Heuchera micrantha) – 6 photos
gooseberry-leaved alumroot (Heuchera grossulariifolia) – 2 photos
gooseberry-leaved alumroot (Heuchera grossulariifolia var. tenuifolia) – 20 photos
green-flowered alumroot (Heuchera chlorantha) – 16 photos
lava alumroot (Heuchera cylindrica) – 94 photos
meadow alumroot (Heuchera chlorantha) – 16 photos
poker alumroot (Heuchera cylindrica) – 94 photos
roundleaf alumroot (Heuchera cylindrica) – 94 photos
small-flowered alumroot (Heuchera micrantha) – 6 photos
small-flowered alumroot (Heuchera micrantha var. diversifolia) – 21 photos
small-flowered alumroot (Heuchera micrantha var. micrantha) – 34 photos
smooth alumroot (Heuchera glabra) – 21 photos
tall alumroot (Heuchera chlorantha) – 16 photos
Alyssum
desert alyssum (Alyssum desertorum) – 36 photos
hoary alyssum (Berteroa incana) – 15 photos
small alyssum (Alyssum alyssoides) – 27 photos
sweet alyssum (Lobularia maritima) – 8 photos
Amadou
Amanita
booted amanita (Amanita porphyria) – 7 photos
fly amanita (Amanita muscaria) – 18 photos
gray-veil amanita (Amanita porphyria) – 7 photos
grey veiled amanita (Amanita porphyria) – 7 photos
powder-cap amanita (Amanita farinosa) – 4 photos
purple brown amanita (Amanita porphyria) – 7 photos
purplish amanita (Amanita porphyria) – 7 photos
Smith's amanita (Amanita smithiana) – 5 photos
western woodland amanita (Amanita silvicola) – 5 photos
yellow-veiled amanita (Amanita augusta) – 12 photos
Amaranth
Argentina amaranth (Amaranthus deflexus) – 3 photos
California amaranth (Amaranthus californicus) – 11 photos
green amaranth (Amaranthus hybridus) – 13 photos
green amaranth (Amaranthus powellii) – 21 photos
hybrid amaranth (Amaranthus hybridus) – 13 photos
livid amaranth (Amaranthus blitum) – 3 photos
pale amaranth (Amaranthus blitum) – 3 photos
Powell's amaranth (Amaranthus powellii) – 21 photos
smooth amaranth (Amaranthus hybridus) – 13 photos
Ammania
western ammania (Ammannia robusta) – 11 photos
Amsinckia
bristly amsinckia (Amsinckia tessellata) – 34 photos
bristly amsinckia (Amsinckia tessellata var. tessellata) – 1 photo
seaside amsinckia (Amsinckia spectabilis) – 7 photos
seaside amsinckia (Amsinckia spectabilis var. spectabilis) – 1 photo
Anellaria
ringed Anellaria (Panaeolus semiovatus) – 4 photos
Anemone
cliff anemone (Anemone multifida) – 20 photos
cliff anemone (Anemone multifida var. multifida) – 19 photos
cliff anemone (Anemone patens var. multifida) – 16 photos
Drummond's anemone (Anemone drummondii) – 31 photos
Drummond's anemone (Anemone drummondii var. drummondii) – 39 photos
Drummond's anemone (Anemone drummondii var. lithophila) – 5 photos
hirsute anemone (Anemone multifida var. saxicola) – 9 photos
Little Belt Mountain anemone (Anemone drummondii var. lithophila) – 5 photos
little mountain anemone (Anemone lyallii) – 27 photos
Lyall's anemone (Anemone lyallii) – 27 photos
northern anemone (Anemone parviflora) – 11 photos
Oregon anemone (Anemone oregana) – 37 photos
Oregon anemone (Anemone oregana var. felix) – 1 photo
Oregon anemone (Anemone oregana var. oregana) – 20 photos
Pacific anemone (Anemone multifida) – 20 photos
Pacific anemone (Anemone multifida var. multifida) – 19 photos
Piper's anemone (Anemone piperi) – 31 photos
small-flowered anemone (Anemone parviflora) – 11 photos
threeleaf anemone (Anemone deltoidea) – 34 photos
western wood anemone (Anemone oregana var. felix) – 1 photo
western wood anemone (Anemone oregana var. oregana) – 20 photos
Angel's-wings
angel's-wings (Pleurocybella porrigens) – 13 photos
Angel-of-death
angel-of-death (Craterellus cornucopioides) – 1 photo
Angelica
Canby's angelica (Angelica canbyi) – 12 photos
Henderson's angelica (Angelica hendersonii) – 21 photos
kneeling angelica (Angelica genuflexa) – 32 photos
Lyall's angelica (Angelica arguta) – 77 photos
seacoast angelica (Angelica lucida) – 37 photos
sharp-tooth angelica (Angelica arguta) – 77 photos
woolly angelica (Angelica hendersonii) – 21 photos
Ankle-aster
Rocky Mountain ankle-aster (Ionactis stenomeres) – 12 photos
Annie
sweet Annie (Artemisia annua) – 4 photos
Antelope-brush
anteleope-brush (Purshia tridentata var. tridentata) – 7 photos
antelope-brush (Purshia tridentata) – 75 photos
Apargidium
apargidium (Microseris borealis) – 14 photos
Apple
cultivated apple (Malus domestica) – 11 photos
Dawson apple (Malus ×dawsoniana) – 3 photos
orchard apple (Malus domestica) – 11 photos
Archangel
yellow archangel (Lamium galeobdolon) – 41 photos
Armillaria
cucumber armillaria (Tricholoma vernaticum) – 3 photos
Armillaria
scaly yellow Armillaria (Floccularia luteovirens) – 6 photos
shaggy-stalked Armillaria (Floccularia albolanaripes) – 4 photos
sheathed Armillaria (Floccularia albolanaripes) – 4 photos
Arnica
broad-leaved arnica (Arnica latifolia) – 64 photos
bunch arnica (Arnica sororia) – 49 photos
clasping arnica (Arnica lanceolata) – 2 photos
clasping arnica (Arnica lanceolata ssp. prima) – 82 photos
cordilleran arnica (Arnica mollis) – 53 photos
hairy arnica (Arnica mollis) – 53 photos
heart-leaf arnica (Arnica cordifolia) – 77 photos
hillside arnica (Arnica fulgens) – 25 photos
leafy arnica (Arnica chamissonis) – 32 photos
longleaf arnica (Arnica longifolia) – 24 photos
meadow arnica (Arnica chamissonis) – 32 photos
mountain arnica (Arnica latifolia) – 64 photos
narrowleaf arnica (Arnica chamissonis) – 32 photos
Nevada arnica (Arnica nevadensis) – 16 photos
orange arnica (Arnica fulgens) – 25 photos
Parry's arnica (Arnica parryi) – 38 photos
rayless arnica (Arnica discoidea) – 17 photos
Rydberg's arnica (Arnica rydbergii) – 32 photos
seep spring arnica (Arnica longifolia) – 24 photos
Sierra arnica (Arnica nevadensis) – 16 photos
silvery arnica (Arnica chamissonis) – 32 photos
slender arnica (Arnica gracilis) – 21 photos
sticky arnica (Arnica ovata) – 22 photos
sticky-leaf arnica (Arnica ovata) – 22 photos
stream bank arnica (Arnica lanceolata) – 2 photos
streambank arnica (Arnica lanceolata ssp. prima) – 41 photos
subalpine arnica (Arnica rydbergii) – 32 photos
twin arnica (Arnica sororia) – 49 photos
Arrow-grass
awl-leaf arrow-grass (Triglochin scilloides) – 36 photos
graceful arrow-grass (Triglochin concinna) – 10 photos
graceful arrow-grass (Triglochin concinna var. concinna) – 6 photos
marsh arrow-grass (Triglochin palustris) – 5 photos
seaside arrow-grass (Triglochin maritima) – 26 photos
striate arrow-grass (Triglochin striata) – 9 photos
Arrowhead
arumleaf arrowhead (Sagittaria cuneata) – 23 photos
common arrowhead (Sagittaria latifolia) – 30 photos
delta arrowhead (Sagittaria platyphylla) – 27 photos
grassy arrowhead (Sagittaria graminea) – 14 photos
northern arrowhead (Sagittaria cuneata) – 23 photos
sessile-fruited arrowhead (Sagittaria rigida) – 12 photos
Artemisia
Artichoke
Jerusalem artichoke (Helianthus tuberosus) – 10 photos
Arugula
Arum
arrow arum (Peltandra virginica) – 3 photos
Italian arum (Arum italicum ssp. italicum) – 2 photos
Ash
Greene's mountain ash (Sorbus scopulina) – 66 photos
Oregon ash (Fraxinus latifolia) – 30 photos
Asparagus
Aspen
quaking aspen (Populus tremuloides) – 86 photos
Asphodel
sticky asphodel (Triantha occidentalis ssp. brevistyla) – 21 photos
western asphodel (Triantha occidentalis) – 15 photos
Aster
alkali American aster (Symphyotrichum ciliatum) – 10 photos
alkali aster (Symphyotrichum frondosum) – 18 photos
alpine aster (Oreostemma alpigenum) – 27 photos
alpine aster (Oreostemma alpigenum var. alpigenum) – 17 photos
alpine leafybract aster (Symphyotrichum foliaceum) – 272 photos
arctic aster (Eurybia sibirica) – 12 photos
bracted aster (Symphyotrichum bracteolatum) – 39 photos
Canby's leafybract aster (Symphyotrichum foliaceum) – 68 photos
Cascade aster (Eucephalus ledophyllus) – 23 photos
Cascade aster (Eucephalus ledophyllus var. ledophyllus) – 19 photos
Columbian white-topped aster (Sericocarpus rigidus) – 16 photos
Columbian whitetop aster (Sericocarpus rigidus) – 16 photos
common California aster (Symphyotrichum chilense) – 28 photos
Cusick's American aster (Symphyotrichum foliaceum) – 136 photos
Cusick's aster (Symphyotrichum foliaceum) – 136 photos
Douglas' aster (Symphyotrichum subspicatum) – 92 photos
Douglas's aster (Symphyotrichum subspicatum) – 92 photos
Eaton's aster (Symphyotrichum bracteolatum) – 117 photos
Engelmann's aster (Eucephalus engelmannii) – 18 photos
few-flowered aster (Canadanthus modestus) – 57 photos
Geyer's smooth aster (Symphyotrichum laeve var. geyeri) – 10 photos
great northern aster (Canadanthus modestus) – 57 photos
Hall's aster (Symphyotrichum hallii) – 44 photos
heath-leaved aster (Symphyotrichum ericoides) – 3 photos
Henderson's aster (Symphyotrichum foliaceum) – 136 photos
intermountain aster (Symphyotrichum ascendens) – 8 photos
Jessica's aster (Symphyotrichum jessicae) – 18 photos
Klickitat aster (Eucephalus glaucescens) – 3 photos
Kootenai aster (Symphyotrichum foliaceum) – 68 photos
lance-leaved aster (Symphyotrichum lanceolatum var. hesperium) – 16 photos
leafy aster (Symphyotrichum foliaceum) – 204 photos
leafy-bracted aster (Symphyotrichum foliaceum) – 204 photos
leafybract aster (Symphyotrichum foliaceum) – 68 photos
little gray aster (Symphyotrichum ericoides var. pansum) – 21 photos
long-leaved aster (Symphyotrichum ascendens) – 16 photos
New England aster (Symphyotrichum novae-angliae) – 74 photos
northern bog aster (Symphyotrichum boreale) – 2 photos
Olympic Mountain aster (Eucephalus paucicapitatus) – 17 photos
Oregon aster (Symphyotrichum bracteolatum) – 117 photos
Oregon white-topped aster (Sericocarpus oregonensis) – 14 photos
Pacific aster (Symphyotrichum chilense) – 28 photos
Palouse aster (Symphyotrichum jessicae) – 9 photos
panicled aster (Symphyotrichum lanceolatum var. hesperium) – 16 photos
Parry's aster (Symphyotrichum foliaceum) – 68 photos
rayless alkali aster (Symphyotrichum ciliatum) – 20 photos
rayless annual aster (Symphyotrichum ciliatum) – 10 photos
rigid white-topped aster (Sericocarpus rigidus) – 16 photos
Rocky Mountain aster (Ionactis stenomeres) – 12 photos
rough white prairie aster (Symphyotrichum falcatum) – 6 photos
rough-leaved aster (Eurybia radulina) – 23 photos
rush aster (Symphyotrichum boreale) – 4 photos
short rayed aster (Symphyotrichum frondosum) – 18 photos
short-rayed alkali aster (Symphyotrichum frondosum) – 18 photos
slender white aster (Symphyotrichum boreale) – 2 photos
smooth aster (Symphyotrichum laeve var. geyeri) – 10 photos
subalpine aster (Eurybia merita) – 11 photos
thickstem aster (Eurybia integrifolia) – 13 photos
tufted white prairie aster (Symphyotrichum ericoides) – 3 photos
tufted white prairie aster (Symphyotrichum ericoides var. pansum) – 21 photos
western American aster (Symphyotrichum ascendens) – 8 photos
western aster (Symphyotrichum ascendens) – 8 photos
western aster (Symphyotrichum spathulatum) – 41 photos
western heath aster (Symphyotrichum falcatum) – 6 photos
western meadow aster (Symphyotrichum campestre) – 38 photos
western mountain aster (Symphyotrichum spathulatum) – 82 photos
western showy aster (Eurybia conspicua) – 45 photos
white heath aster (Symphyotrichum ericoides var. pansum) – 21 photos
white panicled aster (Symphyotrichum lanceolatum var. hesperium) – 16 photos
white prairie aster (Symphyotrichum falcatum) – 6 photos
white-topped aster (Sericocarpus rigidus) – 16 photos
Avens
bigleaf avens (Geum macrophyllum) – 71 photos
large-leaved avens (Geum macrophyllum) – 71 photos
purple avens (Geum rivale) – 8 photos
Ross's avens (Geum rossii) – 9 photos
water avens (Geum rivale) – 8 photos
yellow avens (Geum aleppicum) – 25 photos
Awl-wort
water awl-wort (Subularia aquatica) – 6 photos
Azalea
alpine azalea (Kalmia procumbens) – 5 photos
false azalea (Rhododendron menziesii) – 49 photos
trailing azalea (Kalmia procumbens) – 5 photos
