Alliaria petiolata
Garlic Mustard
Alnus cordata
Italian Alder
Alnus glutinosa
Alder
Alstonia pneumatophora
Marsh Pulai
Alternanthera brasiliana
Ruby Leaf
Althaea officinalis
Marsh-mallow
Alyogyne huegelii
Blue Hibiscus
Alysicarpus ovalifolius
Alyce Clover
Alysicarpus vaginalis
Alyce Clover
Amaranthus hybridus
Green Amaranth
Amaranthus retroflexus
Common Amaranth
Ambrosia artemisiifolia
Ragweed
Amelanchier lamarckii
Juneberry
Ammi majus
Bullwort
Amsinckia micrantha
Common Fiddleneck
Anamirta cocculus
Indian Berry
Anaphalis margaritacea
Pearly Everlasting
Anchusa azurea
Garden Anchusa
Andrographis paniculata
Creat
Andromeda polifolia
Bog-rosemary
Androsace villosa
Hairy Androsace
Anemone nemorosa
Wood Anemone
Anemone ranunculoides
Yellow Anemone
Anemone sylvestris
Snowdrop Anemone