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Li C.,Chinese Academy of Sciences | Li C.,Shanghai Key Laboratory for Plant Functional Genomics and Resources | Yang L.-H.,Huizhou Forestry Research Institute | Tian D.-K.,Chinese Academy of Sciences | And 8 more authors.
Phytotaxa | Year: 2016

Begonia leipingensis D. K. Tian, L. H. Yang & C. Li (2n = 30), a new species in Begonia sect. Coelocentrum from the limestone area of Guangxi, China. B. leipingensisis is easily distinguished from any other compound-leaved species in Begonia by its large variation in petiolule number and its unique spirally-arranged petiolule pattern, which has never been seen in Begoniaceae before and rarely seen even in other angiosperm taxa. Besides having non-overlapping flowering periods, it is clearly different from B. fangii, the most morphologically similar species in the same section and with the same chromosome number. In addition to its unique petiolule pattern, B. leipingensis has longer abaxial wings, shorter internodes, and usually larger leaves, leaflets and habit. Molecular phylogenetic analysis showed that B. leipingensis formed an independent lineage belonging to Sect. Coelocentrum. Morphological and phylogenetic evidence strongly supports this species as a new taxon in Sect. Coelocentrum of Begonia. B. leipingensis was assessed to be critically endangered based on criterion outlined by IUCN Red List Categories and Criteria. © 2016 Magnolia Press.

Yang L.-H.,Huizhou Forestry Research Institute | Yang L.-H.,CAS South China Botanical Garden | Yang L.-H.,University of Chinese Academy of Sciences | Zhou J.-G.,Huizhou Forestry Research Institute | And 4 more authors.
Phytotaxa | Year: 2015

Oreocharis pilosopetiolata, a new species of Gesneriaceae from southeastern Guangdong, China, is described and illustrated. This species resembles O. benthamii var. benthamii, O. benthamii var. reticulata and O. xiangguiensis, but it differs from these species by its leaf and indumentum characters, which are discussed in this paper. © 2015 Magnolia Press.

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