Thallus thin or becoming moderately thick, smooth or more often granulate, chinky or areolate, the granules or verrucae rarely becoming heaped in the thicker forms, ash- to green-gray, occurring in rounded areas, or irregularly and often widely spread over the substratum; apothecia minute to middle-sized, 0.35 to 1.2 mm. in diameter, adnate, black, flat to more commonly convex, the frequently flexuous exciple often becoming covered; hypothecium pale to dark brown; hymenium pale below, but usually more or less colored above; paraphyses distinct, but often more or less coherent; asci clavate; spores ovoid-ellipsoid, 8 to 17 mic. long and 5 to 9 mic. wide ([Fig. 3]).
Collected in Lake, Adams, and Hocking counties. On bark and rocks. Not previously reported from Ohio. Rare, but doubtless distributed widely in the State.
11. Lecidea albocaerulescens (Wulf.) Schaer. Lich. Helv. Spic. 3: 142. 1828.
Lichen albocaerulescens Wulf. in Jacq. Coll. Bot. 2: 184. pl. 5. f. 1. 1788.
Thallus smooth or somewhat rough, more or less chinky or becoming obscurely small-areolate, ash- to green-gray, or becoming olivaceous, spreading over the substratum as a continuous, moderately thick crust; apothecia small to large, 0.5 to 1.5 mm. in diameter, adnate or more or less immersed, usually flat, almost always white or rusty-green pruinose, the black exciple rarely becoming covered; hypothecium brown to black-brown; hymenium commonly pale; paraphyses distinct, but usually coherent; asci clavate to inflated-clavate; spores ovoid-ellipsoid, 15 to 24 mic. long and 7 to 10 mic. wide.
Collected in Preble, Hocking, and Lake counties. Also examined from Lawrence County. On rocks other than calcareous. Not previously reported from Ohio. Rare, but apparently distributed widely in the State.
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.