Portugal

Black Nightshade

Solanum nigrum

black pea

Lathyrus niger

Argentine pepperweed

Lepidium bonariense

Argentine senna

Senna corymbosa

Arisaig Crisp-moss

Tortella flavovirens

Arizona beggar-ticks

Bidens aurea

arizona-cypress

Cupressus arizonica

Arrow bamboo

Pseudosasa japonica

Arrow-Grass

Triglochin maritima

Arrowhead dogfish

Deania profundorum

Arrowleaf clover

Trifolium vesiculosum

Arrowleaf sida

Sida rhombifolia

Arsenic bush

Senna septemtrionalis

Artemisia

Artemisia vulgaris

Athelopsis lembospora

Atlantic chimaera

Hydrolagus affinis

Atlantic Giant Pumpkin

Cucurbita maxima

Atlas Cedar

Cedrus atlantica

Aulacoseira ambigua

Aulacoseira granulata

aurochs

Bos taurus

Arthonia punctiformis

Arthonia stellaris

Arthrorhaphis citrinella

Ascocoryne cylichnium

Ascodesmis nigricans

ash

Fraxinus excelsior

Ash whitefly

Siphoninus phillyreae

Ash whitefly parasitoid

Encarsia inaron

Ashy Willow

Salix cinerea

Asian wavy bittercress

Cardamine occulta

Asiatic Dayflower

Commelina communis

Asparagus fern

Asparagus densiflorus

Asparagus Rust

Puccinia asparagi

Asterionella formosa

Asian Clam

Corbicula fluminalis

Asian date mussel

Arcuatula senhousia

Asian kelp

Undaria pinnatifida

Asian Lady Beetle

Harmonia axyridis

Asian Pony'S-Foot

Dichondra micrantha

Asian Tiger Mosquito

Aedes albopictus

Asparagus

Asparagus officinalis

Aspergillus glaucus

Asterisk Lichen

Arthonia radiata

Asteromyia Gall Midge Fungus

Botryosphaeria dothidea

Bell-Bean

Vicia faba

Bencomia

Bencomia caudata

Bending Bittercress

Cardamine flexuosa

Bending Wayfaring Tree

Viburnum lantana

Bengal Gram

Cicer arietinum

Bengal trumpet

Thunbergia grandiflora

Bergamot Mint

Mentha aquatica

Bermuda buttercup

Oxalis pes-caprae

bermuda cedar scale

Carulaspis minima

Bermudagrass

Cynodon dactylon

Bermuda Thistle

Argemone mexicana

Big quakinggrass

Briza maxima

Big Smoky Bracket

Bjerkandera fumosa

Big-Sting Nettle

Urtica dioica

Bine

Humulus lupulus