Alnus glutinosa
Alder
Alopecurus aequalis
Orange Foxtail
Alopecurus geniculatus
Marsh Foxtail
Alopecurus pratensis
Meadow Foxtail
Althaea officinalis
Marsh-mallow
Amanita fulva
Tawny Grisette
Amanita muscaria
Amanita rubescens
Blusher
Amaranthus hybridus
Green Amaranth
Amaranthus retroflexus
Common Amaranth
Ambrosia artemisiifolia
Ragweed
Ammophila arenaria
Marram
Amorphophallus prainii
Voodoo Lily
Amsinckia micrantha
Common Fiddleneck
Anacamptis morio
Green-winged Orchid
Anacamptis pyramidalis
Pyramidal Orchid
Anaphalis margaritacea
Pearly Everlasting
Andromeda polifolia
Bog-rosemary
Anemone nemorosa
Wood Anemone
Angelica sylvestris
Wild Angelica
Anomodon viticulosus
Rambling Tail-moss
Antennaria dioica
Mountain Everlasting
Anthemis arvensis
Corn Chamomile
Anthemis cotula
Stinking Chamomile