porose

Epidermis usually more or less distinct and strongly porose above.

The cortex is not at all porose or spongy, in color reddish or brown, fragile indeed, but not to the touch, in the herbarium enduring for years.

Thallus large, forking, areolate, porose, with broad diffused midrib; gemmæ in a cup-shaped receptacle.

Thallus thickened in the middle by a keeled costa, usually conspicuously porose, with dark purple scales beneath; gemmæ none.

Thallus dichotomous, copiously reticulate and porose, with a narrow costa; gemmæ none.