Prickly Wild Rose 
Prostrate ceanothus 
Prunus arabica 
Prunus bucharica 
Prunus nigra 
Prunus pensylvanica 
Prunus pumila 
Prunus spinosissima 
Prunus × yedoensis 
Punjab Fig 
Purple marshlocks 
Purple-flowered raspberry 
Purshia tridentata 
Quince 
Rafflesia fig 
Red Ash 
Red Chokeberry 
Red Mulberry Tree 
Red Raspberry 
Reeve's Spirea 
Rhamnus libanoticus 
Rhamnus punctata 
Roman Nettle 
Rosa arabica