Browse by genus:

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
Genus names beginning with A:
170 genera
625 species
120 subspecies and varieties
Show only taxa with photos
Abies – fir (4 species)
Abortiporus (1 species)
Abronia – abronia (3 species)
Abronia – sandverbena (3 species)
Abrothallus (1 species)
Abutilon – Indian mallow (1 species)
Acanthophysellum (1 species)
Acanthophysium (3 species)
Acarospora (19 species)
Acer – maple (8 species)
Achillea – yarrow (2 species)
Achlys – deerfoot (2 species)
Achlys – vanillaleaf (2 species)
Achnatherum – needlegrass (8 species)
Achnatherum – ricegrass (8 species)
Acmispon – deervetch (4 species)
Acmispon – lotus (4 species)
Aconitum – monkshood (1 species)
Aconogonon – fleeceflower (2 species)
Acorus – sweet flag (2 species)
Acroscyphus (1 species)
Actaea – baneberry (3 species)
Actaea – bugbane (3 species)
Adelinia – Adeline's hound's tongue (1 species)
Adelolecia (2 species)
Adenocaulon – pathfinder (1 species)
Adenocaulon – trail plant (1 species)
Adiantum – maidenhair fern (1 species)
Adonis – adonis (1 species)
Adonis – pheasant-eye (1 species)
Aegilops – goatgrass (1 species)
Aegopodium (1 species)
Aesculus – horse chestnut (1 species)
Agaricus (37 species)
Agastache – agastache (2 species)
Agastache – giant-hyssop (2 species)
Agastache – horse-mint (2 species)
Ageratina – snakeroot (1 species)
Agoseris – false-dandelion (9 species)
Agoseris – mountain-dandelion (9 species)
Agrimonia – agrimony (2 species)
Agrocybe (4 species)
Agropogon (1 species)
Agropyron – wheatgrass (2 species)
Agrostemma – corn campion (1 species)
Agrostemma – corncockle (1 species)
Agrostis – bentgrass (14 species)
Agyrium (1 species)
Ahtiana (2 species)
Ailanthus – tree-of-heaven (1 species)
Aira – hairgrass (3 species)
Ajuga – bugle (1 species)
Albatrellus (9 species)
Alboleptonia (4 species)
Albotricha (2 species)
Alcea – hollyhock (1 species)
Alchemilla (0 species)
Alectoria (5 species)
Aleuria (1 species)
Aleurocystidiellum (2 species)
Aleurodiscus (4 species)
Alhagi – camel-thorn (1 species)
Aliciella – aliciella (2 species)
Aliciella – gilia (2 species)
Alisma – water-plantain (3 species)
Allantoparmelia (1 species)
Alliaria – garlic mustard (1 species)
Allium – garlic (26 species)
Allium – onion (26 species)
Alloclavaria (1 species)
Allotropa – candystick (1 species)
Allotropa – sugarstick (1 species)
Alnus – alder (4 species)
Alopecurus – foxtail (7 species)
Alopecurus – meadow-foxtail (7 species)
Alpova (1 species)
Alstroemeria (1 species)
Alyssum – alyssum (3 species)
Amandinea (2 species)
Amanita (21 species)
Amaranthus – amaranth (12 species)
Amaranthus – pigweed (12 species)
Ambrosia – bursage (5 species)
Ambrosia – burweed (5 species)
Ambrosia – ragweed (5 species)
Amelanchier – serviceberry (3 species)
Amelanchier – shadbush (3 species)
Ammannia – ammannia (2 species)
Ammannia – redstem (2 species)
Ammannia – tooth-cup (2 species)
Ammophila – beachgrass (2 species)
Amorpha – false indigo (1 species)
Amphinema (1 species)
Amphiscirpus – Nevada clubrush (1 species)
Ampulloclitocybe (2 species)
Amsinckia – amsinckia (6 species)
Amsinckia – fiddleneck (6 species)
Amsinckia – tarweed (6 species)
Amygdalaria (2 species)
Amylocorticium (1 species)
Amylocystis (1 species)
Amylostereum (1 species)
Anaphalis – pearly-everlasting (1 species)
Anaptychia (1 species)
Anchusa – alkanet (2 species)
Anchusa – anchusa (2 species)
Anchusa – bugloss (2 species)
Andromeda – bog-rosemary (1 species)
Andromeda – moorwort (1 species)
Andropogon (0 species)
Androsace – androsace (2 species)
Androsace – fairy-candelabra (2 species)
Androsace – rock-jasmine (2 species)
Anemone – anemone (9 species)
Anemone – windflower (9 species)
Anethum (1 species)
Angelica – angelica (5 species)
Anisocarpus – anisocarpus (1 species)
Anisomeridium (2 species)
Annulohypoxylon (1 species)
Anomoloma (2 species)
Anomoporia (1 species)
Antennaria – everlasting (17 species)
Antennaria – pussy-toes (17 species)
Anthemis – chamomile (2 species)
Anthemis – dogfennel (2 species)
Anthemis – mayweed (2 species)
Anthoxanthum – vernalgrass (2 species)
Anthracobia (2 species)
Anthriscus – anthriscus (3 species)
Anthriscus – chervil (3 species)
Anticlea – death camas (2 species)
Antirrhinum – snapdragon (1 species)
Antrodia (12 species)
Antrodiella (2 species)
Anzina (1 species)
Apera – windgrass (2 species)
Aphanes – parsley-piert (3 species)
Aphyllon – broomrape (6 species)
Apium – celery (2 species)
Apocynum – dogbane (3 species)
Aquilegia – Columbine (4 species)
Arabidopsis – mouse-ear cress (2 species)
Arabidopsis – thale cress (2 species)
Arabis – rockcress (7 species)
Aralia – spikenard (1 species)
Arbutus – madroña (2 species)
Arbutus – madrone (2 species)
Arbutus – madroño (2 species)
Arcangeliella (1 species)
Arceuthobium – dwarf mistletoe (6 species)
Arcteranthis – false-buttercup (1 species)
Arctium – burdock (2 species)
Arctium – clotbur (2 species)
Arctoparmelia (2 species)
Arctostaphylos – bearberry (6 species)
Arctostaphylos – manzanita (6 species)
Arenaria – sandwort (2 species)
Argemone (0 species)
Aristida – aristida (1 species)
Aristida – threeawn (1 species)
Armeria – sea-pink (2 species)
Armeria – thrift (2 species)
Armillaria (6 species)
Armoracia – horseradish (1 species)
Arnica – arnica (13 species)
Aronia (1 species)
Arrhenatherum – oatgrass (1 species)
Arrhenia (8 species)
Artemisia – artemisia (21 species)
Artemisia – mugwort (21 species)
Artemisia – sagebrush (21 species)
Artemisia – wormwood (21 species)
Arthonia (12 species)
Arthophacopsis (1 species)
Arthopyrenia (4 species)
Arthothelium (2 species)
Arthrorhaphis (1 species)
Artomyces (2 species)
Arum – lords-and-ladies (1 species)
Aruncus – goatsbeard (1 species)
Asarum – wild ginger (1 species)
Asclepias – milkweed (4 species)
Ascobolus (4 species)
Ascocoryne (1 species)
Ascophanus (1 species)
Ascotremella (1 species)
Askellia – elegant hawksbeard (1 species)
Askellia – hawksbeard (1 species)
Asparagus – asparagus (1 species)
Asperugo – catchweed (1 species)
Asperugo – madwort (1 species)
Aspicilia (16 species)
Aspidotis – aspidotis (1 species)
Aspidotis – Indian's dream (1 species)
Aspilidea (1 species)
Asplenium – spleenwort (3 species)
Asterodon (1 species)
Asterophora (2 species)
Asterostroma (1 species)
Astraeus (2 species)
Astragalus – locoweed (45 species)
Astragalus – milk-vetch (45 species)
Astragalus – poison-vetch (45 species)
Astragalus – rattle-pod (45 species)
Athelia (4 species)
Athyrium – lady-fern (2 species)
Athysanus – athysanus (1 species)
Athysanus – sandweed (1 species)
Atocion – catchfly (1 species)
Atriplex – greasewood (15 species)
Atriplex – orache (15 species)
Atriplex – saltbush (15 species)
Atriplex – shadscale (15 species)
Atriplex – silverscale (15 species)
Atropa (1 species)
Atropellis (2 species)
Aubrieta (1 species)
Aucuba (1 species)
Aureoboletus (1 species)
Auricularia (1 species)
Auriscalpium (1 species)
Avena – oats (3 species)
Azolla – mosquito-fern (2 species)