Pseudocyphellae and Pored Epicortex in the Parmeliaceae: Their Delimitation and Evolutionary Significance
- 1 February 1981
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Lichenologist
- Vol. 13 (1) , 1-10
- https://doi.org/10.1017/s0024282981000030
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.This publication has 0 references indexed in Scilit: