Ananas bracteatus 
Anatolian Orchid 
Ancamptis palustris 
Anchored water hyacinth 
Andre's Epidendrum 
Androcymbium palaestinum 
Aneilema acuminatum 
Angraecum calceolus 
Angraecum lecomtei 
Angraecum mauritianum 
Angraecum pectinatum 
Angraecum rhynchoglossum 
Angraecum rutenbergianum 
Ania penangiana 
Aninga 
Annual ryegrass 
Anoectochilus monicae 
Antennae-carrying restrepia 
Anthogonium gracile 
Anthurium cabrerense 
Anthurium carinatum 
Anthurium caucanum 
Anthurium cuspidatum 
Anthurium formosum