Rabdosia
Racinaea
Ramonda
Ranunculus
Raoulia
Ratibida
Rehmannia
Reineckea
Reinwardtia
Reseda
Rhamnus
Rhaphidophyton
Rhaphiolepis
Rheum
Rhinactinidia
Rhinanthus
Rhodiola
Rhododendron
Rhodohypoxis
Rhodophiala
Rhodothamnus
Rhodotypos
Rhus
Rhynchocorys
Ribes
Ricinus
Rindera
Riocreuxia
Robinia
Rodgersia
Roemeria
Rohdea
Romanzoffia
Romneya
Romulea
Rosa
Roscoea
Rosmarinus
Rostrinucula
Rosularia
Rubus
Rudbeckia
Ruellia
Rumex
Ruscus
Ruta