Acanthus hirsutus 
Acanthus syriacus 
Aeschynanthus tricolor 
African violet 
Allegheny Monkeyflower 
Alpine butterwort 
American alpine speedwell 
American Beautyberry 
American cancer-root 
American Germander 
American Lopseed 
American pennyroyal 
American Speedwell 
American water horehound 
Anarrhinum forskahlii 
Anemopaegma arvense 
Anise Hyssop 
Anisomeles indica 
Anticharis glandulosa 
Antirrhinum majus 
Apple mint 
Arabian Globularia 
Arabian jasmine 
Austral bugle