Belgium

Arachnopeziza aurata

Arachnopeziza aurelia

Arborvitae Leafminer

Argyresthia thuiella

Arched Earthstar

Geastrum fornicatum

Arched Woodwax

Hygrophorus camarophyllus

arch-fronted swimming crab

Liocarcinus navigator

Arctic barrel-bubble

Retusa obtusa

Arctic Burreed

Sparganium natans

Arctic cancellate chiton

Leptochiton cancellatus

Arctic cowrie

Trivia arctica

Arctic dwarf birch

Betula nana

Arctic poppy

Papaver nudicaule

Arctic Rush

Juncus arcticus

Arcyria affinis

Arcyria ferruginea

Arcyria stipata

Argentina Vervain

Verbena bonariensis

Argentine ant

Linepithema humile

Argentine Barley

Hordeum euclaston

Australian Bur-grass

Tragus australianus

Australian Carrot

Daucus glochidiatus

Australian cup grass

Eriochloa australiensis

Australian fingergrass

Chloris truncata

Australian Goosefoot

Dysphania pumilio

Australian lovegrass

Eragrostis leptostachya

Australian millet

Panicum decompositum

Australian Pigweed

Dysphania glomulifera

Australian Pine

Pinus nigra

Australian saltbush

Atriplex semibaccata

Australian Shoveler

Spatula rhynchotis

Australian spider beetle

Ptinus tectus

Australian Spinach

Chenopodiastrum murale

Australian stork's bill

Erodium cygnorum

Australian tubeworm

Ficopomatus enigmaticus

Australian waterbuttons

Cotula australis

Australian windmill grass

Chloris ventricosa

Austrian flax

Linum austriacum

Austrian Yellow-cress

Rorippa austriaca

Autumnal Moth

Epirrita autumnata

Autumnal Rustic

Eugnorisma glareosa

Autumn Berry

Elaeagnus umbellata

Autumn Crocus

Colchicum autumnale

Autumn Crocus

Crocus nudiflorus

Autumn fern

Dryopteris erythrosora

autumn green carpet

Chloroclysta miata

Autumn Hawkweed

Hieracium sabaudum

Autumn Millet

Panicum dichotomiflorum

Avens

Geum urbanum

Avian goosefoot

Chenopodium hircinum

Avocado

Persea americana

Awl Aster

Symphyotrichum pilosum

Awl-Leaf Mudwort

Limosella aquatica

Awlwort

Subularia aquatica

Awned Canary-grass

Phalaris paradoxa

Awnless Barnyard Grass

Echinochloa colonum

Awnless Geranium

Geranium molle

Azalea Gall

Exobasidium japonicum

Azalea lace bug

Stephanitis pyrioides

Azalea leafminer

Caloptilia azaleella

Babington's Orache

Atriplex glabriuscula