A Revision of Psora (Lecideaceae) in North America

Timdal E. 1986. A Revision of Psora (Lecideaceae) in North America. The Bryologist. 89(4):253-275

Eighteen species are recognized in the lichen genus Psora in North America. Six species are described as new (P. californica, P. montana, P. nitida, P. pacifica, P. pseudorussellii, and P. tenuifolia), one is validated (P. tuckermanii R. Anderson ex Timdal), and one new combination is proposed (P. himalayana (Church. Bab.) Timdal). Two species are reduced to synonymy (P. concava B. deLesd. with P. crenata (Taylor) Reinke, and P. elenkinii Rass. with P. himalayana). Psora himalayana and P. vallesiaca (Schaerer) Timdal are new to North America.

Type
Journal Article
Authors
Timdal, Einar
Units
CHIS
Keywords
New Species, Pacific fishscale lichen (Psora pacifica), Plant Studies, Santa Cruz Island Channel Islands National Park CA

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