Acanthaceae (Acanthus family)
Aclistocharaceae
Acoraceae (Calamus family)
Acrobolbaceae
Acrobolbus
Austrolophozia
Enigmella
Goebelobryum
Lethocolea
Marsupidium
Tylimanthus
Acrochaetiaceae
Acrochaetium
Audouinella
Kylinia
Rhodochorton
Acrosymphytaceae
Schimmelmannia
Acrotylaceae
Acrotylus
Amphiplexia
Hennedya
Ranavalona
Reinboldia
Actinidiaceae (Chinese Gooseberry family)
Actinochloridaceae
Adelanthaceae
Adelanthus
Calyptrocolea
Wettsteinia
Adoxaceae (Moschatel family)
Aextoxicaceae
Ahnfeltiaceae
Ahnfeltia
Porphyrodiscus
Achariaceae
Caloncoba
caloncoba
Hydnocarpus
hydnocarpus
Pangium
Achatocarpaceae (Achatocarpus family)
Phaulothamnus
phaulothamnus
Aizoaceae (Fig-marigold family)
Akaniaceae
Alismataceae (Water-plantain family)
Allisoniaceae
Allisonia
Alseuosmiaceae