Petrocosmea is a genus of the family Gesneriaceae, the African violet family. Many of the species within this genus are endemic to high-elevation areas in Western China, although some are native to other parts of Asia. including north-central and southern China, Indochina, and the eastern Himalayas. It is a rosette-forming genus that generally grows on wet mossy rocks or forests.

The genus was discovered in China by Augustine Henry and was first described in 1887 by Daniel Oliver (Prof. of Botany, University College, London).

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