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DOI: http://dx.doi.org/10.11646/phytotaxa.144.1.1

New combinations in Asiatic Oxybasis (Amaranthaceae s.l.): evidence from morphological, carpological and molecular data

Alexander P. Sukhorukov, Pertti Uotila, Mingli Zhang, Hong-Xiang Zhang, Anna S. Speranskaya, Anastasiya A. Krinitsyna

Abstract


Two new combinations are proposed in Oxybasis (Chenopodioideae, Chenopodiaceae or Amaranthaceae s.l.). Chenopodium micranthum, described from Russia in the 1860s and known as C. urbicum subsp. sinicum in China, is assigned specific rank in Oxybasis. It appears to be widespread in China, Mongolia, Kazakhstan and Asiatic Russia. The Siberian-Mongolian C. gubanovii, recently described as a new species in Chenopodium sect. Pseudoblitum, is also assigned to Oxybasis. Molecular phylogenetic analysis using maximum likelihood (ML) and maximum parsimony (MP) methods confirmed the placement of C. micranthum and C. gubanovii in the genus Oxybasis. Distribution maps of O. micrantha and O. gubanovii are provided, the latter species being reported for the first time in the Chinese part of the Altai Mountains. A lectotype for C. micranthum (= O. micrantha) is designated.


Keywords


Chenopodiaceae, Chenopodium, China, distribution, Kazakhstan, Mongolia, Russia, taxonomy

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