Castanopsis malipoensis and C. jinpingensis, two new species of Fagaceae from Yunnan, China, are described and illustrated. The former grows in mixed forests on limestone hills of the Malipo County and is closely related morphologically to C. xichouensis, differing from it by having thinner leaves, shorter petioles, flat glabrous cupule spines, and larger nuts. The latter is restricted to the thick forest on Mt. Wutai in the Jinping County, most resembling C. platyacantha, but differing from it by its entire leaf-margin, slender cupule spines without pubescences, and having smaller nuts. A key to the two species and their allies is provided.
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