3. Lecidea varians Ach. Syn. Meth. Lich. 38. 1914. Thallus of very minute, raised or flattened, green-gray to yellow-green granules, these forming a thin but continuous, smooth or granulate-rugose, often chinky crust, usually bordered and often decussated by black lines; apothecia minute, 0.12 to 0.25 mm. in diameter, often clustered or even conglomerate, adnate, from pale yellow to brown and finally black, flat with a thin exciple to convex with covered exciple; hypothecium pale to pale yellow; hymenium pale below, but often yellow or blue-violet above; paraphyses usually coherent, distinct or indistinct; asci clavate; spores oviod-ellipsoid, 7 to 15 mic. long and 5 to 7.5 mic. wide. Collected in Adams County. On maple bark. Also reported from Franklin County. The plant is so minute and inconspicuous as to be very difficult to detect and is probably distributed widely in the State. 4. Lecidea rupestris (Scop.) Ach. Meth. Lich. 70. 1803. (See Fig. 10). _Lichen rupestris_ Scop. Fl. Carn. ed. 2. 2: 363, 364. 1772. Thallus a continuous, moderately thick, smooth or more or less roughened, often chinky to subareolate, ash-gray, yellow-green, or darkening crust; apothecia small to large, 0.4 to 1.3 mm. in diameter, at first immersed but becoming adnate, yellow to yellow or red-brown, flat to strongly convex and the exciple covered; hypothecium pale or pale yellow; hymenium pale; paraphyses coherent, semi-distinct to indistinct; asci clavate; spores ellipsoid, 10 to 15 mic. long and 5 to 7 mic. wide. Collected in Adams Country. On calcareous rocks. Not previously reported from North America. 5. Lecidea viridescens (Schrad.) Ach. Meth. Lich. 62. 1903. _Lichen viridescens_ Schrad. Spic. Fl. Germ. 88. 1794. Thallus of very minute, smooth or deliquescent and powdery, ash-grey to grey-green granules, spread over the substratum as a thin or rarely thicker crust; apothecia minute to small, 0.2 to 0.5 mm. in diameter, adnate, frequently clustered or even conglomerate, becoming black, from flat with the thin livid or darker exciple visible to convex with the exciple covered; hypothecium pale or darker brown; hymenium pale to pale brown; paraphyses coherent, semi-distinct to indistinct; asci clavate; spores oblong-ellipsoid, 9 to 12 mic. long and 4 to 5.5 mic. wide. Collected on Little Mountain in Lake County, and in Hocking County. On logs in woods. Not previously reported from Ohio, and probably rare in the State. 6. Lecidea humicola (Ach.) comb. nov. _Lecidea uliginosa humicola_ Ach. Meth. Lich. 43. 1903. Thallus of very minute inconspicuous and evanescent, brown-black granules; apothecia minute, 0.2 to 0.4 mm. in diameter, adnate, dark brown to black, scattered or clustered, plain with a thin concolorous exciple visible, to convex with the exciple finally covered; hypothecium dark brown; hymenium pale brown; asci clavate; paraphyses coherent-indistinct; spores oblong-ellipsoid, 9 to 15 mic. long and 5 to 7 mic. wide.