Raphanus sativus L. (Synonym : Raphanus sativus var. macropodus f. raphanistroides (Makino) Makino)

Family : Brassicaceae

Raphanus sativus L. var. hortensis Backer f. raphanistroides Makino

Family : Brassicaceae

Rapistrum rugosum (L.) All. (Synonym : Bunias raphanifolia Sm.)

Family : Brassicaceae [Naturalized plant]

Rehmannia glutinosa (Gaertn.) Libosch. ex Steud. (Synonym : Digitalis glutinosa Gaertn.)

Family : Scrophulariaceae

Reynoutria ciliinervis (Nakai) Moldenke (Synonym : Polygonum multiflorum Thunb. var. ciliinerve (Nakai) Steward)

Family : Polygonaceae

Reynoutria forbesii (Hance) T.Yamaz. (Synonym : Reynoutria elliptica (Koidz.) Migo ex Nakai)

Family : Polygonaceae

Reynoutria japonica Houtt. (Synonym : Polygonum cuspidatum Siebold & Zucc.)

Family : Polygonaceae

Reynoutria multiflora (Thunb.) Moldenke (Synonym : Bilderdykia multiflora (Thunb.) Roberty & Vautier)

Family : Polygonaceae

Reynoutria sachalinensis (F.Schmidt) Nakai (Synonym : Polygonum sachalinense F.Schmidt)

Family : Polygonaceae

Rhamnella franguloides (Maxim.) Weberb. (Synonym : Microrhamnus franguloides Maxim.)

Family : Rhamnaceae