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Hale, ME", Jr. 1981: Pseudocyphellae and pored epicortex in the Parmeliaceae: their delimitation and evolutionay significance. - Lichenologist 13: 1-10. [RLL List # 109-29 / Rec.# 7365]
Keywords: PSEUDOCYPHELLAE/ PORED EPICORTEX/ PARMELIACEAE/ DEVELOPMENT/ ANATOMY/ EVOLUTION
Abstract: 1 table. 3 figures. ["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 differetn phyletic lines."]

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