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Issue: Vol. 501 No. 1: 19 May 2021
Type: Article
Published: 2021-05-19
DOI: 10.11646/phytotaxa.501.1.6
Page range: 151–161
Abstract views: 21
PDF downloaded: 1

Euphorbia mongoliensis (Euphorbiaceae), a new species from Inner Mongolia, China

Baotou Medical College, Baotou, Inner Mongolia 014040, China
Baotou Medical College, Baotou, Inner Mongolia 014040, China
Inner Mongolia Institute of Traditional Chinese Medicine, Hohhot, Inner Mongolia 010020, China
Baotou Medical College, Baotou, Inner Mongolia 014040, China Inner Mongolia Key Laboratory of Characteristic Geoherbs Resources Protection and Utilization, Baotou, Inner Mongolia 014040, China Inner Mongolia Engineering Research Center of The Planting and Development of Astragalus membranaceus of the Geoherbs, Baotou, Inner Mongolia 014040, China
Baotou Medical College, Baotou, Inner Mongolia 014040, China Inner Mongolia Institute of Traditional Chinese Medicine, Hohhot, Inner Mongolia 010020, China Inner Mongolia Key Laboratory of Characteristic Geoherbs Resources Protection and Utilization, Baotou, Inner Mongolia 014040, China Inner Mongolia Engineering Research Center of The Planting and Development of Astragalus membranaceus of the Geoherbs, Baotou, Inner Mongolia 014040, China
Eudicots Flora of China Euphorbia morphology phylogenetics

Abstract

In May 2020, a new taxon of Euphorbia, Euphorbiaceae was collected from a dry hillside of Dongsheng District, Ordos City, Inner Mongolia. The morphological characteristics of the specimens analyzed differ from those of the known Euphorbia species from this region; therefore, we suspected this may be a new species, and we set to analyze the ITS2 sequences of some Euphorbia species. The results show that the new taxon belongs to the sect. Esula of Euphorbia subg. Esula. It is similar to Euphorbia esula (description from Flora of China) but does not belong to the same species. Concomitantly, plant morphological data and pollen morphology results show significant differences between the new taxon, E. esula and E. caesia, a finding that supports the delimitation of this new taxon, which is named Euphorbia mongoliensis in accordance with its geographical distribution.