Alyssum paphlagonicum 
Alyssum simplex 
Alyssum subspinosum 
Alyssum szovitsianum 
Amazon Giant Waterlily 
Amazon Lily 
Amboyna Pine 
Amelanchier canadensis 
American alpine speedwell 
American alumroot 
American Basketflower 
American basswood 
American Beautyberry 
American beech 
American bellflower 
American Bittersweet 
American Black Elderberry 
American bladdernut 
American blue-eyed grass 
American Burnweed 
American Cancer-root 
American chestnut 
American Columbo 
American Cornmint