Ohio Biological Survey, Bull. 10, Vol. 11, No. 6 | Page 6

brown 1. B. sphaeroides Apothecia black 4. B. melaena
1. Bilimbia sphaeroides (Dicks.) Koerb. Syst. Lich. 213. 1855.
Lichen sphaeroides Dicks. Pl. Crypt. Brit. 1: 9. pl. 2. f. 3. 1785.
Thallus of minute, gray-green, often heaped granules, these forming a continuous, thin or thicker crust; apothecia minute to small, 0.2 to 0.4 mm. in diameter, adnate, flesh-colored to red-brown, flat to convex and subglobose, the inconspicuous, concolorous exciple soon covered; hypothecium and hymenium pale; paraphyses usually coherent-indistinct; asci clavate; spores fusiform-ellipsoid, 4-celled, 12 to 20 mic. long and 4 to 6 mic. wide.
Collected on Little Mountain, in Lake County. On a rotten log in a wood. Rare in Ohio, and its distribution unknown.
The plant is typical internally, but is young with small, flat or slightly convex, light-colored apothecia.
2. Bilimbia hypnophila (Ach.) Th. Fr. Nov. Act. Reg. Soc. Sci. Ups. III. 3: 283. 1861.
Lecidea hypnophila Ach. Lich. Univ. 199. 1810.
Thallus of minute, usually crowded, sometimes confluent granules, these forming an ash- or green-gray, thin, leprose or subgranulose, sometimes scattered and disappearing crust; apothecia minute to middle-sized, 0.2 to 0.75 mm. in diameter, light brown to black, adnate to sessile, scattered or clustered, becoming strongly convex and the exciple becoming covered; hypothecium pale or darker brown; hymenium pale, or tinged brown below and more plainly brown above; paraphyses coherent, semi-distinct to indistinct; asci clavate or long-clavate; spores ellipsoid to fusiform, 4- to 8-celled, 16 to 35 mic. long and 4 to 8 mic. wide.
Collected in Preble, Hocking, and Adams counties. Over mosses on rocks or bases of trees; or rarely on rocks, soil, bark, or wood. Not previously reported from Ohio, and not a common fungus in the State.
3. Bilimbia naegelii (Hepp) Zwackh. Flora. 45: 505. 1862.
Biatora naegelii Hepp, Spor. Flecht. Eur. pl. 4. f. 1. 19. 1853.
Thallus of usually flattened granules, these commonly running together to form a moderately thin, more or less roughened, often chinky, ash- or green-gray, or darkening, limited or rarely wide-spread crust; apothecia minute to middle-sized, 0.2 to 0.9 mm. in diameter, adnate or rarely sessile, flesh-colored to dark brown, scattered or clustered, flat with the thin exciple visible to strongly convex with the exciple covered; hypothecium pale or tinged brown; hymenium pale throughout or tinged brown above; paraphyses coherent, semi-distinct to indistinct; asci clavate; spores fusiform-ellipsoid, 4- to 8-celled, 18 to 25 mic. long and 3 to 4 mic. wide.
Collected in Highland County. On bark. Not previously reported from Ohio, and doubtless rare in the State.
The usual width given for the spores is 4 to 6 mic., and our plant is placed here provisionally.
4. Bilimbia melaena (Nyl.) Th. Fr. Lich. Scand. 383-385. 1871.
Lecidea melaena Nyl. Bot. Not. 1853: 182. 1853.
Thallus of minute, olive-green to black-brown granules, these forming a thin, granulose or scurfy, sometimes disappearing crust; apothecia minute to small, 0.25 to 0.55 mm. in diameter, black-brown to black, sessile, occurring singly or in clusters, strongly convex to subglobose, the exciple soon covered; hypothecium pale brown to red-brown; hymenium pale or tinged brown; paraphyses coherent, semi-distinct to indistinct; asci clavate to inflated-clavate; spores oblong-ellipsoid or dactyloid, 2- to 4-celled, 12 to 22 mic. long and 4 to 6 mic. wide.
Collected in Lake County. On an old log in a wood. Not previously reported in Ohio, and rare in the State.
Nylander called the apothecium pale within, but forms with red-brown hypothecia are admitted by later writers.
5. Bilimbia microcarpa Th. Fr. Bot. Not. 1863: 8. 1863.
Bilimbia obscurata microcarpa Th. Fr. Nov. Act. Soc. Sci. Ups. III. 3: 183. 1861.
Thallus of minute ash-gray or green-gray granules, these rarely forming a thin or moderately thick, subcontinuous, verrucose crust, but more often scattered or disappearing entirely; apothecia minute to small, 0.25 to 0.7 mm. in diameter, scattered or conglomerate, dirty brown to black, soon becoming convex and subglobose, with the pale exciple then covered; hypothecium pale to pale red-brown; hymenium pale; asci clavate to inflated-clavate; paraphyses coherent-indistinct; spores fusiform, 4-celled, 16 to 25 mic. long and 4 to 6 mic. wide.
Collected in Hocking County. On shaded sandstone. Not previously reported from North America.
6. Bilimbia trachona (Ach.) Oliver Lich. France 38,39. 1903.
Verrucaria trachona Ach. Meth. Lich. Suppl. 16. 1803.
Thallus thin and granular, passing into smooth or leprose conditions, thence to thickened and subareolate states, ash-colored to dark brown-green, usually continuous over considerable areas; apothecia minute to middle-sized, 0.4 to 0.1 mm. in diameter, from brown-black with lighter exciple to wholly black, adnate or somewhat immersed, flat or finally convex with the exciple at length covered; hypothecium pale brown to black-brown; hymenium pale or rarely pale brown; paraphyses distinct to coherent semi-distinct; asci clavate; spores fusiform-dactyloid, 4-celled, 12 to 20 mic. long and 2.5 to 4.5 mic. wide (Fig. 5).
Collected in several localities in Preble, Highland, and Adams counties. On rocks, usually limestone. Also reported from Cuyahoga and Ottawa counties. Not common, but doubtless distributed