Thallus of minute granules, these usually compacted into a thin or rarely thicker, granulate, chinky, or subareolate, ash- or green-gray or darkening, commonly wide-spread, continuous or scattered crust; apothecia minute to middle-sized, 0.2 to 0.75 mm. in diameter, pale brown to finally black, adnate or rarely more or less immersed, usually flat and bordered by the commonly lighter colored exciple, rarely becoming convex, the exciple then finally covered; hypothecium pale to brown; hymenium pale to pale brown; paraphyses coherent, semi-distinct to indistinct; asci clavate to long-clavate, spores 4- to 8-celled, 15 to 40 mic. long and 1.5 to 2.6 mic. wide.
Collected in Butler, Preble, Highland, Adams, Warren, and Lake counties. On various rocks in shaded or open moist places, and also about the moist shaded bases of rocks in dry fields. Also reported from Cuyahoga county and doubtless common in all parts of the State.
6. Bacidia incompta (Borr.) Anzi. Cat. Lich. Sondr. 70. 1860.
Lecidea incompta Borr. in Sowerby, Engl. Bot. Suppl. 2: pl. 2699. 1834.
Thallus of very minute granules, these forming a continuous or more or less broken, wide-spread, sometimes thick and rugose or rarely even subareolate, or again thin, smooth, more or less mealy, light or darker green-gray, rarely disappearing crust; apothecia minute to middle-sized, 0.3 to 0.75 mm. in diameter, dark brown to black, adnate to sub-sessile, flat or becoming convex, with a thin and frequently flexuous exciple; hypothecium pale brown to brown; hymenium pale below and pale brown above; paraphyses coherent, semi-distinct to indistinct; asci long-clavate; spores 4- to 12-celled, 18 to 35 mic. long and 1.5 to 3 mic. wide.
Collected in Adams County. On bark. Not previously reported from Ohio, and doubtless rare in the State.
7. Bacidia umbrina (Ach.) Br. & Rostr. Bot. Tidssk. 3: 235. 1869.
Lecidea umbrina Ach. Lich. Univ. 183. 1810.
Thallus a rather thick and continuous, or rarely thinner and scattered, subleprose, chinky, rugose-granulate or subareolate, green-gray to dark olive-brown, sometimes largely disappearing crust; apothecia minute to small, 0.25 to 0.6 mm. in diameter, light brown to black, adnate to somewhat immersed, at first flat with a commonly paler exciple, becoming convex with the exciple sometimes covered; hypothecium pale or darker brown; hymenium pale throughout, or tinged brown above; paraphyses coherent, semi-distinct to indistinct; asci long-clavate, or inflated-clavate; spores hamate, or more or less spirally twisted, about 4- to 8-celled, 18 to 30 mic. long and 2 to 3 mic. wide ([Fig. 7]).
Collected in Preble, Lake, Hocking, and Adams counties. Also examined from Wayne County. On various rocks. Not previously reported from Ohio, but evidently distributed widely in the State.