Fagopyrum calcicola (Polygonaceae), a distinct new species from limestone mountains of southern Yunnan Province, southwest China
文献类型: 外文期刊
作者: Xie, Xiaoting;Gou, Yuting;Min, Daozhang;Lei, Shuqing;Zhu, Zhenhua;Li, Wei;Zhou, Meiliang;Tan, Yunhong;Li, Bo
作者机构:
关键词: Buckwheat family;Cytology;Palynology;Polygonoideae;Taxonomy
期刊名称: GENETIC RESOURCES AND CROP EVOLUTION
ISSN: 0925-9864
年卷期: 2025 年 73 卷 1 期
页码:
收录情况: SCIE(2025版)
摘要: After 15 years of field observations and morphological, cytological, palynological, and molecular phylogenetic analyses of the genus Fagopyrum (Fagopyreae, Polygonaceae), we confirm and illustrate F. calcicola Bo Li, M. L. Zhou and Y. H. Tan, a distinct new species from limestone mountains in southern Yunnan, China. Morphological and molecular evidence indicate that F. calcicola belongs to sect. Fagopyrum and shows a close relationship with F. dibotrys. Both species are perennial herbs bearing large corymbose inflorescences and long trigonous achenes that greatly exceed the persistent perianth. F. calcicola is distinct in having a persistent lignified stem base, while F. dibotrys has a stout woody rhizome. Additionally, F. calcicola can be readily distinguished from F. dibotrys by its stems densely covering lenticels and long oblique ocreae. The new species is restricted to karst limestone habitats and may provide valuable germplasm for buckwheat breeding. Detailed information on its distribution, habitat, pollen morphology, somatic chromosome numbers, and a comprehensive morphological description are provided.
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