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.

Buellia De Not. Giorn. Bot. Ital. 21: 195. 1846.

Thallus granulose, verrucose, or areolate, rather better developed than
those of the preceding genera as shown in the more frequent verrucose
and areolate conditions; apothecia minute to large, sessile to immersed,
the disk and the exciple usually black; hypothecium usually brown;
hymenium pale to light brown; paraphyses usually distinct; spores brown,
2-celled.

KEY TO THE SPECIES OF BUELLIA

On rocks 3. B. _turgescentoides_
On wo