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Cortical Structure in Physcia and Phaeophyscia

Published online by Cambridge University Press:  28 March 2007

M. E. Hale
M. E. Hale
Affiliation:
Department of Botany, Smithsonian Institution, Washington, DC 20560, U.S.A.
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Abstract

Species of Physcia reported to have a paraplectenchymatous lower cortex appear to have a dual cortex consisting of a lower paraplectenchymatous layer and an upper periclinally arranged prosoplectenchymatous layer. These species may have a black or pale lower surface but always contain atranorin. They should be retained in the genus Physcia.

Type
Research Article
Information
The Lichenologist , Volume 15 , Issue 2 , June 1983 , pp. 157 - 160
Copyright
Copyright © British Lichen Society 1983

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