Main features of the subsection :
Small shrubs ; young shoots scaly , glabrous or (in R. setosum) setose.
Leaves evergreen, usually papillose beneath, scales on lower surface of one or two types, distant or dense, broadly rimmed. Inflorescence a terminal umbellate raceme, 1-several-flowered. Calyx minute to conspicuous. Corolla usually open-campanulate, rarely hypocrateriform . Stamens 5-10(-11), usually regularly arranged.
Style impressed , straight or declinate. Seeds unwinged and obscurely finned.
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