American Vetch      

American Water Horehound      

American Water Plantain      

American Woollyfruit Sedge          

Amur Honeysuckle      

Amur Maple      

Analogue Sedge      

Anemone          

Annual Bluegrass      

Annual Buckwheat          

Annual Canarygrass          

Annual Marsh Elder          

Annual Polemonium          

Annual Rabbitsfoot Grass      

Annual Ragweed          

Arctic Brome      

Arctic Rush          

Arctic Sweet Coltsfoot          

Armoracia          

Arnica          

Aromatic Aster          

Arrowgrass          

Arrowhead          

Arrowleaf Balsamroot      

Arrowleaf Sweet Coltsfoot          

Arrowleaf Tearthumb      

Arumleaf Arrowhead      

Ash          

Asiatic Dayflower          

Asparagus          

Assiniboia Sedge          

Aster          

Atlantic Ninebark          

Aunt Lucy          

Austrian Yellowcress          

Autumn Dwarf Gentian          

Autumn Onion          

Autumn Willow          

Avens          

Awlfruit Sedge