Ll. Norvell et Sa. Redhead, Phaeocollybia in western North America 2: the vernal P. pleurocystidiata sp nov, and P. carmanahensis reconsidered, MYCOLOGIA, 92(5), 2000, pp. 984-991
Examination of herbarium specimens and newly collected basidiomes combined
with molecular analyses of representatives of several different taxa has un
covered the existence of a new Phaeocollybia species from Washington, Orego
n, and California. Phaeocollybia pleurocystidiata represents the first spec
ies described from the United States and Canada known to exhibit a vernal p
henology. Morphological and molecular comparison of the type of P. carmanah
ensis with newly collected material reveals it to be conspecific with the e
arlier named P oregonensis; an emended description of P. oregonensis is pro
vided.