Ranunculus inundatus 
Ranunculus isthmicus 
Ranunculus macrorhynchus 
Ranunculus millefolius 
Ranunculus myosuroides 
Ranunculus paludosus 
Ranunculus pinardii 
Ranunculus saniculifolius 
Ranunculus scandicinus 
Ranunculus tenuilobus 
Ranunculus uncinatus 
Red Baneberry 
Rockslide Larkspur 
Rough-fruited buttercup 
Rue Anemone 
Sagebrush buttercup 
Scarlet Pheasant's Eye 
Sharp-lobed Hepatica 
Sharp-lobed Hepatica 
Siberian Larkspur 
Small-fruit pheasant's-eye 
Small-leaved Clematis 
Snow Buttercup 
Stinking Hellebore