1417 
Princes Pine Rattlesnake Grass 
Prunella Rattlesnake Plantain 
Prunus Razoumof skya 
Pseudotsuga Red Fescue 
Psilocarphus Red-top 
Pteridium Reed 
Pteridophyta Canary grass 
Pteris Grass 
Pterospora Rein Orchis 
Puccoon Rhamnaceae 
Pulsatilla Rhamus 
Purple Flag Rhodiola 
Purslane Rhododendron 
Family Rhus 
Pyrola Rhynchospora 
Pyrolaceae Ribes 
Pyrrocoma Rice 
Pyrus Mountain 
Quackgrass Ripgut Grass 
Quaking Bromegrass 
Quamasia 
Queen cup 
Quillwort 
Radicula 
Radish 
Ragweed 
Ranunculeccae 
Rancunculus 
Rephanus 
Raspberry 
Rosaceae 
Rose 
Family 
Root 
Rosemary 
Rotala 
Rough Hairgrass 
Rubiaceae 
Rubus 
Rudbeckia 
Rue 
Meadow 
