United States

Aconite

Aconitum napellus

Critically Endangered

Admiralty Island Meadow Vole (Admiraltiae)

Microtus pennsylvanicus

Agrimony

Agrimonia eupatoria

Near Threatened

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Aspen Bracket

Phellinus tremulae

Aspen Comma Lichen

Arthonia patellulata

Aspen Leaf Blotch Miner

Phyllonorycter apparella

Aspen Oyster Mushroom

Pleurotus populinus

Asp-Of-Jerusalem

Isatis tinctoria

ass

Equus asinus

Assassin bug

Zelus renardii

Assyrian plum

Cordia myxa

Asterisk Lichen

Arthonia radiata

Aster leafminer

Calycomyza humeralis

Aster-Like Boltonia

Boltonia asteroides

Asteromyia Gall Midge Fungus

Botryosphaeria dothidea

Astrantia

Astrantia major

Athel tamarisk

Tamarix aphylla

athenarian burrowing anemone

Nematostella vectensis

Atlantic Bay Scallop

Argopecten irradians

Atlantic Bluefin Tuna

Thunnus thynnus

Atlantic Cordgrass

Sporobolus alterniflorus

Atlantic Giant Pumpkin

Cucurbita maxima

Atlantic Ninebark

Physocarpus opulifolius

Atlantic Poison Oak

Toxicodendron pubescens

Atlantic Puffin

Fratercula arctica

Atlantic Sedge

Carex atlantica

Aubretia

Aubrieta deltoidea

Audubon's Warbler

Setophaga auduboni

Auger beetle

Sinoxylon ceratoniae

August Flower

Scorzoneroides autumnalis

August-Lily

Hosta plantaginea

auricled twayblade

Neottia auriculata

aurochs

Bos taurus

Aurora Damsel

Chromagrion conditum

Austin's peat moss

Sphagnum austinii

Australian brake

Pteris tremula

Australian Bur-grass

Tragus australianus

Australian cheesewood

Pittosporum undulatum

Australian fingergrass

Chloris truncata

Australian Goosefoot

Dysphania pumilio

Australian lovegrass

Eragrostis leptostachya

Australian Pine

Pinus nigra

Australian redcedar

Toona ciliata

Australian saltbush

Atriplex semibaccata

Australian spider beetle

Ptinus tectus

Australian Spinach

Chenopodiastrum murale

Critically Endangered

Australian spotted jellyfish

Phyllorhiza punctata

Australian stork's bill

Erodium cygnorum

Australian tallowwood

Eucalyptus microcorys

Near Threatened

Australian teatree

Leptospermum laevigatum

Australian tobacco

Nicotiana suaveolens

Australian tubeworm

Ficopomatus enigmaticus

Australian violet

Viola hederacea

Australian waterbuttons

Cotula australis

Australian windmill grass

Chloris ventricosa

Austrian copper rose

Rosa foetida

Austrian timmia

Timmia austriaca

Austrian Yellow-cress

Rorippa austriaca

Autumnal Moth

Epirrita autumnata

Autumn Bent

Agrostis perennans

Autumn Berry

Elaeagnus umbellata

Autumn Clematis

Clematis terniflora

Autumn Crocus

Colchicum autumnale