THE ASCOMYCETES OF OHIO IV 
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4. Biatorina chalybeia (Borr.) Mudd, Man. Brit. Lich. 180. 1861. 
Lecideachalybeia Borr, in Sowerby, Eng. Bot. Suppl. 1: pi. 2687. f. 2.1831. 
Thallus a thin, smooth or roughened, ash-gray and darkening crust, 
forming a continuous layer, becoming inconspicuous and rarely disappear¬ 
ing; apothecia minute to small, 0.3 to 0.5 mm. in diameter, adnate to 
sessile, concave to slightly convex, black, the exciple concolorous, promi¬ 
nent, 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 subsquaniulose 
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 dacty- 
loid, 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 brown..1. B. sphaeroides 
Apothecia black ...4. B. melaena 
1. Bilimbia sphaeroides (Dicks.) Koerb. Syst. Lich. 213. 1855. 
Lichen sphaeroides Dicks. PI. Crypt. Brit. 1: 9. pi. 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; hypo¬ 
thecium 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. 
