Begonia jinyunensis (Begoniaceae, section Platycentrum), a new palmately compound leaved species from Chongqing, China

Botanical Studies
Bo DingChing-I Peng

Abstract

Continental China is the center of Begonia species diversity in Asia and contains more than 60 species out of about 110 named species of section Platycentrum. Mt. Jinyun, located in Chongqing City at the upper reaches of the Yangtze River, harbors a subtropical broadleaved forest with high species diversity. During a botanical survey in Mt. Jinyun, an unknown Begonia species of sect. Platycentrum with palmately compound leaves was collected and studied based on detailed morphological observations and cytological and molecular phylogenetic analyses. The unknown Begonia bears a superficial resemblance to B. hemsleyana in having palmately compound leaves, a feature unseen in other species of sect. Platycentrum in China. It is however sharply distinct from the latter in the acaulous habit with aerial stems seen only at anthesis and long rhizomes (vs. erect stems to 70 cm or taller with short rhizomes), 4-6 pinnatilobed leaflets with indistinct, decurrent petiolules (vs. 7-10 serrate leaflets with distinct petiolules), and white (vs. pink) tepals. Molecular phylogenetic analyses based on nuclear ribosomal DNA and chloroplast DNA sequences indicated that this species was allied to Platycentrum species occurring in Southwest and South...Continue Reading

References

Feb 13, 2003·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·M. IruelaT. Millán
Aug 13, 2003·Bioinformatics·Fredrik Ronquist, John P Huelsenbeck
Nov 13, 2007·BMC Evolutionary Biology·Alexei J Drummond, Andrew Rambaut
Feb 11, 2010·Journal of Applied Genetics·S R PhadkeN Braverman
Feb 22, 2012·Molecular Phylogenetics and Evolution·Koh NakamuraChing-I Peng
Dec 1, 2014·Botanical Studies·Ching-I PengHsun-An Yang

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Citations

Aug 9, 2020·PhytoKeys·Dai-Ke TianKe-Jian Yan

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