Denmark

Arachnopeziza aurata

Arachnopeziza aurelia

Archaeperidinium minutum

Arched Earthstar

Geastrum fornicatum

Arched Woodwax

Hygrophorus camarophyllus

arch-fronted swimming crab

Liocarcinus navigator

Arctic barrel-bubble

Retusa obtusa

Arctic bramble

Rubus arcticus

Arctic Burreed

Sparganium natans

Arctic cowrie

Trivia arctica

Arctic Kidney Lichen

Nephroma arcticum

Arctic Mushroom Scales Lichen

Lichenomphalia hudsoniana

Arctic roughmya

Panomya norvegica

arctic starflower

Lysimachia europaea

Arcyria affinis

Arcyria stipata

Arcyria versicolor

Arenarious Milk-vetch

Astragalus arenarius

argali

Ovis ammon

Argentina Vervain

Verbena bonariensis

Australian broomrape

Orobanche cernua

Australian dodder

Cuscuta australis

Australian Goosefoot

Dysphania pumilio

Australian Pine

Pinus nigra

Australian spider beetle

Ptinus tectus

Australian Spinach

Chenopodiastrum murale

Austrian flax

Linum austriacum

Austrian leopard's-bane

Doronicum austriacum

Austrian Yellow-cress

Rorippa austriaca

Autumnal Moth

Epirrita autumnata

Autumnal Rustic

Eugnorisma glareosa

Autumnal Snout

Schrankia intermedialis

Autumn Crocus

Colchicum autumnale

autumn green carpet

Chloroclysta miata

Autumn Millet

Panicum dichotomiflorum

Avens

Geum urbanum

Avian goosefoot

Chenopodium hircinum

Avocado

Persea americana

Awkward Clusterfly

Pollenia rudis

Awl Aster

Symphyotrichum pilosum

Awl-Leaf Mudwort

Limosella aquatica

awl-leaved forklet moss

Dicranella subulata

Awlwort

Subularia aquatica

Awned Canary-grass

Phalaris paradoxa

Awnless Barnyard Grass

Echinochloa colonum

Awnless Geranium

Geranium molle

Azalea Gall

Exobasidium japonicum

Azalea leafminer

Caloptilia azaleella

Babington's Orache

Atriplex glabriuscula

Baby blue eyes

Nemophila menziesii

Baby Rose

Rosa multiflora

Baby'S Breath

Galium sylvaticum

Bacidia biatorina

Bacidia fraxinea

Bacidia friesiana

Bacidia laurocerasi

Bacidina phacodes

Bacteriastrum hyalinum

Badhamia capsulifera

Badhamia dubia