Rattans Beardtongue          

Rattans Monkeyflower          

Raups Indian Paintbrush          

Red Bartsia          

Red Besseya          

Red Bush Monkeyflower          

Red Canyon Beardtongue          

Red Monkeyflower          

Red Turtlehead          

Redrattle          

Redwood Keckiella          

Richardsons Penstemon          

Ridgestem False Foxglove          

Riggins Penstemon          

Rigid Indian Paintbrush          

Rincon Mountain Indian Paintbrush          

Rio Grande Twintip          

Ritters Coraldrops          

Roadside Toadflax          

Rockjasmine Monkeyflower