German Dmitry A, Koch Marcus A
Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany; South-Siberian Botanical Garden, Altai State University, Lenin Str. 61, 656049 Barnaul, Russia.
Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany.
PhytoKeys. 2017 Jan 5(76):13-21. doi: 10.3897/phytokeys.76.9731. eCollection 2017.
The paper reports as a novelty to the flora of Mexico and Middle America in general. The finding stands ca. 1600 km apart from the closest known locality in the Rocky Mountains of Colorado, USA. The species is considered native to NW Mexico and its late discovery in the region is presumably explained by its tiny habit, early flowering time, and subephemeral life cycle. The phylogenetic position of this Mexican population in a haplotype network based on the chloroplast DNA fragment A-H confirms this hypothesis and also suggests, in contrast to the previously held viewpoint, multiple colonizations of North American continent from Asia.
该论文报道了这一植物对墨西哥和整个中美洲植物区系而言是新发现。这一发现距离美国科罗拉多州落基山脉已知的最近地点约1600公里。该物种被认为原产于墨西哥西北部，其在该地区的较晚发现可能是由于其微小的习性、早花时间和亚短命的生命周期。基于叶绿体DNA片段A-H的单倍型网络中这个墨西哥种群的系统发育位置证实了这一假设，并且与之前的观点相反，还表明亚洲曾多次殖民北美大陆。
