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Pseudocyphellae and Pored Epicortex in the Parmeliaceae: Their Delimitation and Evolutionary Significance

Published online by Cambridge University Press:  28 March 2007

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

The origin and development of pseudocyphellae and the pored epicortex are compared. Pseudocyphellae are pores through the paraplectenchymatous cortex which fill with medullary hyphae. The pored epicortex is a thin, perforated polysaccharide sheet lying over a loosely organized cortical layer. Both structures function in gas exchange and may represent two different phyletic lines.

Type
Research Article
Information
The Lichenologist , Volume 13 , Issue 1 , February 1981 , pp. 1 - 10
Copyright
Copyright © British Lichen Society 1981

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