INTRODUCING THE SPOTTED SAXIFRAGES: SAXIFRAGA SECT. BRONCHIALES, SECT. NOV. (SAXIFRAGACEAE)

被引：9
|
作者：
DeChaine, Eric G. [1 ]
机构：
[1] Western Washington Univ, Dept Biol, Bellingham, WA 98225 USA
来源：
RHODORA | 2014年 / 116卷 / 965期
基金：
美国国家科学基金会;
关键词：
arctic-alpine; Asia; Beringia; endemism; Haida Gwaii; Japan Pacific Northwest; Rocky Mountains; Saxifraga sect. Bronchiales; S; sect; Trachyphyllum; Saxifragaceae; Siberia; NORTH-AMERICA; PHYLOGEOGRAPHY; REFUGIA;
D O I：
10.3119/13-09
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Recent molecular phylogenetic analyses have revealed that Saxifraga sect. Trachyphyllum as currently circumscribed is polyphyletic, with the designated type, S. aspera, falling outside of the more speciose clade. Several other lines of morphological, geographic, and ecological evidence also distinguish the two distantly related groups from one another. In combination, these data necessitate the circumscription of a new section, S. sect. Bronchiales, which is described herein. The section is hypothesized to have arisen in the southern Rocky Mountains of North America, followed by northwestward expansion across Beringia and diversification among refugia.
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收藏
页码：25 / 40
页数：16
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