Abstract
Rosa longshoushanica L.Q. Zhao & Y.Z. Zhao, a new species from Gansu and Inner Mongolia, China, is described and illustrated. It is placed in Rosa sect. Cinnamomeae ser. Beggerianae due to the following characters: leaflets 5–9, flowers with bracts, sepals after anthesis deciduous. Rosa longshoushanica differs from the morphologically closest species R. willmottiae by the sepals being abaxially densely pubescent and stipitate glandular, puberulous leaflets, and hooked prickles that are in pairs below the leaves.
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