lichen-Lasallia papulosa

Lasallia papulosa

Lasalia papulosa

Lasalia papulosa photo by Bob Klips

Lasallia papillosa wet and dry

Lasallia papulosa wet and dry photo by Ray Showman

DIAGNOSTIC FEATURES: Central attachment; blistered thallus; undersurface pale brown, pitted; no rhizines except centrally; compare with L. pensylvanica with undersurface uniformly black, papillate-areolate.

ECOLOGY: This Appalachian species is fairly common in unglaciated Ohio; usually found on sandstone, very rarely on soil or bark adjacent to colonies on rock.

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