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