Arrowhead spider 
Arrowleaf Balsamroot 
Arrowleaf Clover 
Arrowleaf Elephant's Ear 
Arrowleaf Groundsel 
Arrowleaf sida 
Arrowleaf Tearthumb 
Arrowleaf violet 
Arsenic bush 
Arsenura armida 
Arsenura batesii 
Arsenura ciocolatina 
Arsipoda chrysis 
Arsipoda montana 
Artabrus erythrocephalus 
Artace cribraria 
Artaxa digramma 
Artaxa drucei 
Artaxa hannemanni 
Artaxa ormea 
Artaxa tanaoptera 
Artemisia arbuscula 
Artemisia jordanica 
Artemisia judaica