Introducing the Spotted Saxifrages:SaxifragaSect.Bronchiales,Sect.Nov. (Saxifragaceae)

Autor:	Eric G. DeChaine
Rok vydání:	2014
Předmět:	biology Ecology Saxifragaceae Plant Science Horticulture biology.organism_classification Sect Beringia Geography Type (biology) Evolutionary biology Polyphyly Saxifraga Clade Endemism
Zdroj:	Rhodora. 116:25-40
ISSN:	1938-3401 0035-4902
DOI:	10.3119/13-09
Popis:	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.
Databáze:	OpenAIRE
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