Acanthus balcanicus Acanthus hirsutus Acanthus syriacus Aeschynanthus tricolor African violet Agastache aurantiaca Ajuga orientalis Allegheny Monkeyflower Alpine butterwort Alpine Cancer-root Alpine Toadflax American alpine speedwell American Beautyberry American Cancer-root American Germander American Lopseed American Speedwell American water horehound Anarrhinum forskahlii Anemopaegma arvense Anise Hyssop Anisomeles indica Anisosepalum humbertii Anisotes madagascariensis