United States

Atlantic Bay Scallop

Argopecten irradians

Atlantic Cordgrass

Sporobolus alterniflorus

Atlantic Giant Pumpkin

Cucurbita maxima

Atlantic Ninebark

Physocarpus opulifolius

Atlantic Puffin

Fratercula arctica

Atlantic Sedge

Carex atlantica

Atractosporocybe inornata

Aubretia

Aubrieta deltoidea

Audubon's Warbler

Setophaga auduboni

Auger beetle

Sinoxylon ceratoniae

August Flower

Scorzoneroides autumnalis

August-Lily

Hosta plantaginea

Ocean Sunfish

Mola mola

auricled twayblade

Neottia auriculata

aurochs

Bos taurus

Austin's peat moss

Sphagnum austinii

Arthonia punctiformis

Arum-Leaf Arrowhead

Sagittaria cuneata

Asa Gray'S Sedge

Carex grayi

Ascending Grapefern

Botrychium ascendens

Ascocoryne cylichnium

ash

Fraxinus excelsior

Ashen Coral

Tremellodendropsis tuberosa

Ashen hoarypea

Tephrosia cinerea

Ash Rust

Puccinia sparganioidis

Ash Tree Bolete

Boletinellus merulioides

Ash whitefly

Siphoninus phillyreae

Ash whitefly parasitoid

Encarsia inaron

Ashy Cinquefoil

Potentilla inclinata

Ashy Clubtail

Phanogomphus lividus

Ashy pipewort

Eriocaulon cinereum

Ashy Willow

Salix cinerea

Asian Ambrosia Beetle

Xyleborinus attenuatus

Asian Bittersweet

Celastrus orbiculatus

Asian crabgrass

Digitaria bicornis

Asian hard clam

Meretrix lusoria

Asian Longhorned Beetle

Anoplophora glabripennis

Asian meadowsweet

Spiraea trilobata

Asian nakedwood

Colubrina asiatica

Asian semele

Theora lubrica

Asian watermeal

Wolffia globosa

Asiatic Dayflower

Commelina communis

Asiatic dewflower

Murdannia spirata

Asiatic red scale

Aonidiella taxus

Asiatic tearthumb

Persicaria perfoliata

Asparagus fern

Asparagus densiflorus

Aspen Comma Lichen

Arthonia patellulata

Aspergillus flavus

Asterionella formosa

Aster leafminer

Calycomyza humeralis

Asterodon ferruginosus

Astrantia

Astrantia major

Asian Bush Mosquito

Aedes japonicus

Asian chestnut gall wasp

Dryocosmus kuriphilus

Asian copperleaf

Acalypha australis

Asian date mussel

Arcuatula senhousia

Asian drill snail

Ocinebrellus inornatus

Asian Fly-Honeysuckle

Lonicera morrowii

Asian green mussel

Perna viridis

Asian kelp

Undaria pinnatifida