Fagopyrum longzhoushanense, a new species of Polygonaceae from Sichuan, China

文献类型： 外文期刊

第一作者： Wang, Cheng-Long

作者： Wang, Cheng-Long;Ding, Meng-Qi;Shao, Ji-Rong;Li, Zhi-Qiang;Zhu, Xue-Mei;Tang, Yu;Liu, Jian-Lin;Wang, Cheng-Long;Zhou, Mei-Liang

作者机构：

关键词： China;Fagopyrum;F. densovillosum;F. gracilipes

期刊名称：PHYTOTAXA （ 影响因子：1.171； 五年影响因子：1.196 ）

ISSN：

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收录情况： SCI

摘要： Fagopyrum longzhoushanense (Polygonaceae) is here described and illustrated as a new species from Longzhoushan (Puge County, Sichuan Province, China) on the basis of morphological, caryological and molecular analyses. The new species is morphologically similar to F. gracilipes from which it differs in having densely pubescent or villose parts, thicker and redbrown stems and branches, dense nodes, rugulose and small postulate leaf blade on the surface, stamens longer than pistils. Another similar species is F. densovillosum from which F. longzhoushanense differs by the winged and greater achenes, and the stamens which are longer than the pistils. From the caryioogical point of view F. longzhoushanense is a diploid species with 2n= 2x= 16 and a karyotype of 16 metacentric chromosomes, while F. gracilipes is tetraploid, 4n= 4x= 32, with a karyotype of 30 metacentric and 2 submetacentric chromosomes. The results of molecular marker analysis (matK) also highlight the distinction of the new species.

分类号： Q94

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