Belgium

Arizona beggar-ticks

Bidens aurea

arizona-cypress

Cupressus arizonica

Armenian crane's-bill

Geranium psilostemon

Aromatic Knight

Tricholoma lascivum

Aromatic Pinkgill

Entoloma pleopodium

Arrhenia griseopallida

Arrhenia lobata

Arrocillo

Paspalum paniculatum

Arrow-Grass

Triglochin maritima

arrow-head scale

Unaspis yanonensis

Arrowleaf clover

Trifolium vesiculosum

Arrowleaf sida

Sida rhombifolia

Artemisia

Artemisia vulgaris

Athelopsis lembospora

Atlantic Giant Pumpkin

Cucurbita maxima

Atlantic Ninebark

Physocarpus opulifolius

Atlantic Puffin

Fratercula arctica

Atlantic rangia

Rangia cuneata

Atlantic Sea Gooseberry

Pleurobrachia pileus

Atlantic Surf Clam

Spisula solidissima

Atlas Cedar

Cedrus atlantica

Atlas Poppy

Papaver atlanticum

Aubretia

Aubrieta deltoidea

August Cosmet

Sorhagenia rhamniella

August Flower

Scorzoneroides autumnalis

august thorn

Ennomos quercinaria

Asa Gray'S Sedge

Carex grayi

a Sand Martin flea

Ceratophyllus styx

Ascochyta syringae

Ascocoryne cylichnium

Ascotremella faginea

ash

Fraxinus excelsior

Ash-bark Piercer

Pammene suspectana

ash-black slug

Limax cinereoniger

Ashen Coral

Tremellodendropsis tuberosa

Ash whitefly

Siphoninus phillyreae

Ashy Cinquefoil

Potentilla inclinata

Ashy Furrow Bee

Lasioglossum sexnotatum

Ashy Mining Bee

Andrena cineraria

Ashy Willow

Salix cinerea

Asian Ambrosia Beetle

Xyleborinus attenuatus

Asian Bittersweet

Celastrus orbiculatus

Asian China-mark

Elophila difflualis

Asian Emerald Dove

Chalcophaps indica

Asian Hornet

Vespa velutina

Asian Longhorned Beetle

Anoplophora glabripennis

Asian Skunk-cabbage

Lysichiton camtschatcensis

Asian wavy bittercress

Cardamine occulta

Asiatic Dayflower

Commelina communis

Asiatic red scale

Aonidiella taxus

Asparagus fern

Asparagus densiflorus

Asparagus Rust

Puccinia asparagi

Aspen Clearwing

Eusphecia melanocephala

Aspen Lappet

Phyllodesma tremulifolia

Aspen Pigmy

Stigmella assimilella

Aster leafminer

Calycomyza humeralis

Astrantia

Astrantia major

Athelia subovata

Asian brush crab

Hemigrapsus takanoi

Asian Bush Mosquito

Aedes japonicus