90 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Collected at four or five localities in the northwestern portion of the State. On trees. 
The plant is reported from widely separate portions of the United States and 
British America and may be looked for anywhere in North America, except perhaps 
in arctic regions. Known in all of the grand divisions except possibly Asia. 
Biatora atrogrisea is the synonym of the preliminary reports. 
6. Bacidia inundata (I*r.) Koerb. Syst. Lich. 187. 1855. 
Biatora inundata Fr. Vet. Akad. Handl. 1822: 270. 1822. 
Thallus composed of minute granules, these commonly compacted into a thin 
or rarely thicker, chinky or subareolate, commonly widely spread, continuous or 
more or less broken, sea-green, ashy, or darkening crust; apothecia small or minute, 
0.3 to 0.7 mm. in diameter, adnate or rarely somewhat immersed, the disk at first flat 
and bordered by an exciple, but soon becoming convex and the exciple disappearing, 
pale brownish, brown, or finally black, the exciple at first lighter than the disk, 
sometimes more or less clustered; hypothecium pale to brown; hymenium pale or 
brownish; paraphyses simple or rarely branched toward the apex, there also usually 
enlarged and brownish, somewhat more coherent than in most species; asci clavate 
or long-clavate; spores 4 to 8-celled, 20 to 40 » long and 1.5 to 2.5 » wide. 
Generally distributed in the State. On various rocks in moist places, and rarely 
on wood. 
Throughout the United States east of the Rocky Mountains and northward to 
Newfoundland. Well known in Europe. 
Biatora inundata of the preliminary reports. 
7. Bacidia incompta (Borr.) Anzi, Cat. Lich. Sondr. 70. 1860. 
Lecidea incompta Borr. in Sowerby, Eng]. Bot. Suppl. 2: pl. 2699. 1834. 
Thallus composed of very minute granules, these forming a continuous or more or 
less broken, widely spread, sometimes thicker and rugose or possibly even subareolate, 
or again thin and smooth or more or less mealy, lighter or darker sea-green crust, 
sometimes becoming obscure or disappearing; apothecia small or minute, 0.35 to 0.75 
mm. in diameter, adnate or perhaps rarely sessile, flat, with a thin and frequently 
flexuous margin, but becoming convex, black or brownish black; hypothecium 
brownish to reddish brown (rarely pale); hymenium pale below and brownish above; 
paraphyses simple or rarely branched toward the apex, there frequently thickened 
and darker; asci long-clavate; spores in ours 4 to 12-celled, 18 to 35 « long and 1.5 to 
3 ye wide. 
Collected on the northern boundary at Rose Lake and at Gunflint. On trees. 
Known elsewhere in North America from New England and Illinois. Common in 
Europe and also reported from the Sandwich Islands. 
Biatora incompta of the preliminary reports. 
8. Bacidia akompsa (Tuck.) Fink. 
Biatora akompsa Tuck. Syn. N. A. Lich. 2: 47. 1888. 
Thallus composed of minute granules, these running together into a scurfy or more 
compact and chinky, smooth or rugose-verrucose, commonly widely spread, ash-colored 
crust; apothecia minute, 0.2 to 0.5 mm. in diameter, sessile or adnate, flat, with an 
uneven, thin margin, or later convex, black; hypothecium pale or brownish; hyme- 
nium pale or pale brownish below and the same or violet-tinged above; paraphyses 
simple or rarely branched toward the apex, there commonly enlarged and darker; 
asci cylindrico-clavate; spores scarcely more than 4-celled in ours, 19 to 24 long and 
1.5 to 2.5 « wide. 
Collected at Battle Lake, Warroad, and Emo, all in the nothwestern portion of the 
State. On trees. 
A North American lichen, known elsewhere on the Pacific coast in California and on 
Vancouver Island. 
Biatora akompsa of the preliminary reports. 
