Thompson, J., 1997. American Arctic Lichens: The Microlichens.

Thallus white, brownish white, ashy or yellow-gray, continuous to fissured but not fully areolate, smooth to rugose-plicate, lacking soredia or isidia.

Fertile verrucae rare, of same color as thallus or with red-brown tips, the base constricted, but there are many sterile verrucae which are with broad bases; ostioles dark brown, 1-4 per verruca, sunken and in a central depression in fertile warts.  Apothecia absent or 1 per verruca; hypothecium pale; epithecium hyaline to dark, K-; hymenium hyaline to yellow-brown; spores generally absent or aborted, biseriate, 4 per ascus (infrequently 2), spore walls double and thin 1-2 µm, smooth and without apical internal convexity (untrimmed), 40-96 X 21-58 µm.

Reactions: cortex K-, C-, KC-, P-, UV-; medulla K-, C+ red, KC+ red, P-. 

Contents: gyrophoric acid, +/- lecanoric acid and traces of unknowns.

This species grows over humus and moss over soil and rocks.  It is apparently an amphi-Beringian, according to Dibben (1980), although it occurs in the White Mountains in New Hampshire, in the East.

 

 

Thallus white, brownish white, ashy or yellow-gray, continuous to fissured but not fully areolate, smooth to rugose-plicate, lacking soredia or isidia. Fertile verrucae rare, of same color as thallus or with red-brown tips, the base constricted, but there are many sterile verrucae which are with broad bases; ostioles dark brown, 1-4 per verruca, sunken and in a central depression in fertile warts. Apothecia absent or 1 per verruca; hypothecium pale; epithecium hyaline to dark, K—; hymenium hyaline to yellow-brown; spores generally absent or aborted, biseriate, 4 per ascus (infrequently 2), spore walls double and thin 1-2 /mm, smooth and without apical internal convexity (untrimmed), 40-96 x 21—58 μm.

Reactions: cortex K—, C—, KC —, P-, UV—; medulla K—, C+ red, KC+ red, P-.

Contents: gyrophoric acid, ± lecanoric acid and traces of unknowns.

This species grows over humus and moss over soil and rocks. It is apparently an amphi-Beringian, according to Dibben (1980), although it occurs in the White Mountains in New Hampshire, in the East.