12. Lecidea platycarpa Ach. Lich. Univ. 173. pl. 2. f. 5. 1810.

Thallus a thin, obscurely or more or less plainly roughened, usually
chinky to subareolate, ash- to green-gray, continuous or more or less
scattered, sometimes disappearing crust; apothecia small to middle-sized
or even larger, 0.4 to 1.5 mm. in diameter, commonly scattered,
brown-black to black, rarely and obscurely white-pruinose, adnate to
sessile, rounded to flexuous, flat or finally convex, the raised exciple
sometimes becoming covered; hypothecium dark brown; hymenium pale below
and colored above; paraphyses distinct or coherent-semidistinct; asci
clavate; spores ovoid- to oblong-ellipsoid, 14 to 20 mic. long and 6 to
10 mic. wide.

Collected in Ross and Hocking Counties. On rocks. Not previously
reported from Ohio.




Biatorina Mass. Ric. Lich. 134. f. 262-271. 1852.

Thallus commonly granulose, and often passing into verrucose and chinky
conditions, but scarcely ever areolate, sometimes scant and evanescent;
apothecia usually minute or small, and commonly adnate, exciple weak and
often becoming covered; hypothecium and hymenium passing from pale
through shades of brown, the former becoming darker than the latter,
this rarely tinged blue or violet above; spores hyaline, 2-celled.