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Issue: Vol. 482 No. 2: 29 January 2021
Type: Article
Published: 2021-01-29
DOI: 10.11646/phytotaxa.482.2.5
Page range: 173–182
Abstract views: 184
PDF downloaded: 1

Fagopyrum longistylum (Polygonaceae), a new species from Sichuan, China

Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China. College of Food Science and Technology, Sichuan Tourism University, Chengdu 610100, China.
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Buckwheat Fagopyrum F. gracilipes new species Eudicots

Abstract

A new species of Fagopyrum (Polygonaceae), Fagopyrum longistylum, is described and illustrated from Huili County, Sichuan Province, China on the basis of morphological, caryological, and molecular data. F. longistylum is morphologically similar to F. gracilipes from which it differs in having green stem and short-styled flowers with long anther but it is self-compatible. In addition, F. longistylum is a diploid species with 2n=2x=16 while F. gracilipes is tetraploid with 4n=4x=32. Molecular data based on nucleotide sequence polymorphisms of internal transcribed spacers (ITSs) and the maturase K (matK) gene confirm the separation of the new species.