Technical Report

Moss flora of the Willamette Valley, Oregon

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  • Included in the Bryophyta are the Hepaticae (liverworts), the Antho­ceratae ( horned liverworts), and the M usci (mosses), all of which are well represented in the Willamette Valley. Since the Musci are much more abundant and conspicuous than the liverworts, they are of considerable gen­eral interest. This group comprises three orders : the Sphagnales, peat mosses; the Andreaeales, rock-inhabiting mosses; and the Bryales, true mosses. This paper deals with the Bryales that have been collected in the Willamette Valley, Oregon; the area extending from the Columbia River on the north to Cottage Grove on the south, and from the foothills of the Cas­cades to the foothills of the Coast Mountains. This comprises part of the counties of Multnomah, Washington, Yamhill, Clackamas, Marion, Polk, Benton, Lane, and Linn. Included are all of the species that have been pre­viously deposited in the herbaria of the University of Oregon and Oregon State College, as well as those collected by the writers. In writing descriptions, especially of those species not collected by the writers, much aid has been obtained from the Mass Flora of North America by A. J. Grout. For information concerning original descriptions and syno­nyms, the reader is referred to the above work. The keys, which are highly artificial, have been constructed for the pur­pose of the identification of specimens rather than for the indication of phylogenetic relationships.
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