Ohio Biological Survey, Bull. 10, Vol. 11, No. 6 | Page 5

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.
KEY TO THE SPECIES OF BIATORINA
Growing on another lichen 1. B. heerii Growing on wood or on rocks. On old wood 2. B. prasina On rocks. Exciple strong and seldom becoming covered 4. B. chalybeia Exciple weak and usually becoming covered 3. B. lentibularis
1. Biatorina heerii (Hepp) Fink Cont. Nat. Herb. 14: 83. 1910.
Biatora heerii Hepp, Spore Flecht. Eur. pl. 16. f. 135. 1853.
Thallus of very minute, rounded and frequently heaped granules, sometimes visible under a hand lens, but often seen only in sections of the substratum, rarely disappearing; apothecia minute, 0.1 to 0.3 mm. in diameter, adnate to sessile, flesh-colored and blackening, flat to slightly convex, the concolorous or darker exciple commonly persistent; hypothecium and hymenium pale to light brown; paraphyses distinct to coherent-indistinct; asci clavate; spores ellipsoid, 7 to 12 mic. long and 3 to 3.5 mic. wide.
Collected in Butler County. On the thallus of Peltigera canina. Not previously reported from Ohio. So minute as to be difficult to detect. Consequently nothing further is known of its distribution in the State.
2. Biatorina prasina (Fr.) Fink Cont. Nat. Herb. 14: 84. 1910.
Micarea prasina Fr. Syst. Orb. Veg. 257. 1825.
Thallus of minute, closely clustered or even heaped granules, these forming a wide-spread, frequently subleprose, green-gray to dark-olive crust; apothecia minute to small, 0.2 to 0.5 mm. in diameter, adnate, commonly carneous or darkening, more or less convex and usually becoming convex with the exciple finally covered; hypothecium pale or pale brown; hymenium pale below and commonly darker above; paraphyses coherent, semi-distinct to indistinct; asci clavate; spores oblong-ellipsoid, 8 to 12 mic. long and 3.5 to 5 mic. wide.
Collected on Little Mountain in Lake County. On a rotten log. Not previously reported from Ohio, and evidently rare in the State.
Simple spores were seen in the specimens collected, but they were supposed to be immature.
3. Biatorina lentibularis (Ach.) Koerb. Syst. Lich. 191. 1855.
Lecidea lentibularis Ach. Syn. Meth. Lich. 28. 1814.
Thallus a thin, smooth or subtartareous, rarely rimose-areolate, ash-white to brown-gray, wide-spread and continuous or finally disappearing crust; apothecia minute to small, 0.2 to 0.5 mm. in diameter, adnate, black, from flat becoming convex and often irregular, the inconspicuous exciple then becoming covered; hypothecium pale to darker brown; hymenium pale or tinged brown; paraphyses distinct to coherent-indistinct; asci clavate; spores oblong-ellipsoid, 8 to 11 mic. long and 2.7 to 4 mic. wide.
A single collection was made in Highland County. On exposed calcareous rocks. Not previously reported from Ohio, and doubtless rare in the State.
An occasional 4-celled spore was seen, a transitional character previously noted by Th. M. Fries. The plant is closely related to the next below, from which it may not be distinct.
4. Biatorina chalybeia (Borr.) Mudd, Man. Brit. Lich. 180. 1861.
Lecidea chalybeia Borr. in Sowerby, Eng. Bot. Suppl. 1: pl. 2687. f. 2. 1831.
Thallus a thin, smooth or roughened, ash-gray and darkening crust, forming a continuous layer, becoming inconspicuous and rarely disappearing; apothecia minute to small, 0.3 to 0.5 mm. in diameter, adnate to sessile, concave to slightly convex, black, the exciple concolorous, prominent, and rarely becoming covered; hypothecium dark brown; hymenium pale below and pale brown above; paraphyses wide and strong, distinct to coherent-indistinct; asci clavate; spores oblong-ellipsoid, 8 to 12 mic. long and 3.5 to 4.75 mic. wide (Fig. 4).
Collected in Butler County. On calcareous rocks. Not previously reported from Ohio, and probably rare in the State.
The spores are somewhat larger than in European specimens.

Bilimbia De Not. Giorn. Bot. Ital. 21: 190. 1846.
Thallus usually composed of minute granules, these often run together to form a leprose or verrucose and rarely areolate or even subsquamulose crust, rarely disappearing; apothecia minute or small, usually adnate, with a weak and often covered exciple; hypothecium pale to dark brown; hymenium pale or tinged brown; spores hyaline, usually fusiform or dactyloid, varying from 4- to 9-celled.
KEY TO THE SPECIES OF BILIMBIA
On rocks. Apothecia and spores smaller 5. B. microcarpa Apothecia and spores larger 6. B. trachona On other substrata. On mosses 2. B. hypnophila On wood or bark. Spores becoming more than 4-celled 3. B. naegelii Spores not more than 4-celled. Apothecia flesh-colored to dark