Rafflesia Kerri 
Rafflesia lagascae 
Ramon's Spurge 
Red mangrove 
Red Passion Flower 
Redwood violet 
Rock Barrelwort 
Rose-of-Sharon 
Roundleaf Yellow Violet 
Rubber Tree 
Sagebrush Violet 
Salix babylonica 
Salix lasiolepis 
Salix matsudana 
Saw-toothed Azara 
Scarlet passion flower 
Sea Spurge 
Seaside Sandmat 
Selkirk's violet 
Serrated Spurge 
Shining willow 
Shrub Violet 
Shrub Violet 
Shrubby St. John's-Wort