Open AccessPoa mansfieldii (Poaceae), a new species endemic to Steens Mountain, Oregon, U.S.A.
Author(s) -
Barbara L. Wilson,
Nick Otting,
Richard E. Brainerd
Publication year - 2019
Publication title -
journal of the botanical research institute of texas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 22
eISSN - 2644-1608
pISSN - 1934-5259
DOI - 10.17348/jbrit.v13.i1.823
Subject(s) - poaceae , range (aeronautics) , botany , rhizome , geography , ecology , biology , composite material , materials science
A short, rhizomatous, gynodioecious Poa occurs on alpine slopes below melting snowbanks on Steens Mountain, an isolated, fault-block mountain in southeast Oregon. It was included in P. chambersii, a dioecious species of Oregon’s Cascade Range with cobwebby hairs on at least the lower calluses, although the Steens Mountain form is gynodioecious and its calluses are glabrous. These differences between the Cascadian and Steens Mountain forms were recognized (Soreng 1998, 2007). The Steens Mountain bluegrass is here described as a narrowly endemic species, Poa mansfieldii.