Acanthus syriacus 
Acanthus-leaved Grevillea 
Acarina-like Lepanthes 
Acer pentapomicum 
Acer tataricum 
Acerola 
Acetabularia major 
Achillea aleppica 
Achillea arabica 
Achillea cretica 
Achillea falcata 
Achillea fragrantissima 
Achiote 
Achlys triphylla 
Achyrocline saturejoides 
Ackee apple 
Aconite-leaved Buttercup 
Aconitum nasutum 
Acorn Fig 
Acorn peperomia 
Acostaea costaricensis 
Acridocarpus excelsus 
Acrotriche serrulata 
Acuri Palm