THE ASCOMYCETES OF OHIO IV 
341 
Collected in Lake, Adams, and Hocking counties. On bark and rocks. 
Not previously reported from Ohio. Rare, but doubtless distributed widely 
in the State. 
11. Lecidea albocaerulescens (Wulf.) Schaer. Lich. Helv. Spic. 3: 142. 
1828. 
Lichen albocaerulescens^vM.m Jacq. Coll. Bot. 2: 184. pi. 5. f. 1. 1788. 
Thallus smooth or somewhat rough, more or less chinky or becoming 
obscurely small-areolate, ash- to green-gray, or becoming olivaceous, spread¬ 
ing over the substratum as a continuous, moderately thick crust; apothecia 
small to large, 0.5 to 1.5 mm. in diameter, adnate or more or less immers¬ 
ed, usually flat, almost always white or rusty-green pruinose, the black 
exciple rarely becoming covered; hypothecium brown to black-brown; 
hymenium commonly pale; paraphyses distinct, but usually coherent; asci 
clavate to inflated-clavate; spores ovoid-ellipsoid, 15 to 24 mic. long and 7 
to 10 mic. wide. 
Collected in Preble, Hocking, and Lake counties. Also examined from 
Lawrence County. On rocks other than calcareous. Not previously 
reported from Ohio. Rare, but apparently distributed widely in the State. 
12. Lecidea platycarpa Ach. Lich. Univ. 173. pi. 2. f. 5. 1810. 
Thallus a thin, obscurely or more or less plainly roughened, usually 
chinky to subareolate, ash- to green-gray, continuous or more or less scat¬ 
tered, sometimes disappearing crust; apothecia small to middle-sized or 
even larger, 0.4 to 1.5 mm. in diameter, commonly scattered, brown-black 
to black, rarely and obscurely white-pruinose, adnate to sessile, rounded 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 evane¬ 
scent; 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 
2 O B S 
