FINK—THE LICHENS OF MINNESOTA. 95 
4a. Buellia myriocarpa polyspora Willey in Tuck. Syn. N. A. Lich. 2: 97. 1888. 
Differs in having 12 to 24 spores in each ascus, 
Collected in widely separated localities and no doubt generally distributed in the 
State. Habitat as above. 
Elsewhere in North America in Massachusetts, Illinois, Wisconsin, and Iowa. Not 
known in other grand divisions, unless it proves to be the same as Buellia dives Th. Fr.¢ 
Buellia myriocarpa punctiformis (Hofim.) Mudd was reported from the northern 
portion of the State, but this is simply the condition of the species with thin and 
disappearing thallus, while subspecies chloropolia (Fr.) Th. Fr. is the form with thicker 
thallus. 
5. Buellia turgescens (Nyl.) Tuck. Gen. Lich. 189. 1872. 
Lecidea turgescens Nyl. Mém. Soc. Sci. Nat. Cherb. 5: 337. 1857. 
Thallus verrucose and commonly areolate, or the swollen verrucee crowded into a 
more or less plicate crust; brownish ashy or rarely with a reddish cast, irregularly 
scattered over the substratum, the thallus in some of the rock specimens showing some 
suggestion of a cellular cortex; apothecia minute, 0.2 to 0.7 mm. in diameter, adnate 
or more or less immersed, the disk black or dark brown, flat or slightly convex, the 
exciple also black and sometimes disappearing; hypothecium dark brown; hymenium 
pale or perhaps more commonly 
brownish, especially above; para- 
physes rarely branched, com- 
monly thickened and brown to- 
ward the apex; asci clavate; 
spores ellipsoid, brown, 9 to 15 
long and 4 to 7 » wide. 
Generally distributed over the 
State. On dead wood and also 
on rocks. Fig. 11.—Buellia myriocarpa. a, Apothecium; b, vertical sec- 
tion of apothecium showing the dark exciple; c, ascus con- 
taining spores. a, Enlarged 4 diameters; 6, 40 diameters; 
c, 450 diameters. From Reinke. 
The rock form was recorded in 
the preliminary reportsas Buellia 
pullata Tuck. 
Elsewhere in North America in New England. Known also in Australia. 
6. Buellia schaereri De Not: in Giorn. Bot. Ital. 2': 199, 1546. 
Thallus thin and scurfy, becoming granulose or sorediate-powdery, brownish-ashy, 
often disappearing; apothecia minute or very minute, 0.15 to 0.45 mm. in diameter, 
adnate, the disk black and flat or becoming variously convex, plicate or papillate, 
the exciple thin, brownish black, often disappearing; hypothecium dark brown, or 
rarely much lighter or only slightly colored; hymenium pale, or pale below and 
brownish above; paraphyses commonly cohering closely, enlarged and brownish 
toward the apex; asci short-clavate or inflated-clavate; spores brown, ellipsoid or 
oblong-ellipsoid, 6 to 10 » long and 2 to 4 pm wide. 
Collected only at Rainy Lake City, but easily overlooked and doubtless occurring 
elsewhere in northern Minnesota. On pines. 
Elsewhere in North America in New England, New Jersey, New York, Illinois, and 
Ontario. Known also in Europe and Africa. 
7. Buellia saxatilis (Schaer.) Koerb. Syst. Lich, 228. 1859. 
Calicium saxatile Schaer. Naturw. Anzeig. Schw. Ges. 5:35. 1821. 
Parasitic, and no thallus discernible except that of the host; apothecia minute, 0.2 
to 0.4 mm. in diameter, sessile on the thallus of the host or at first somewhat immersed, 
the disk flat and black or rarely becoming convex, the exciple brownish black, com- 
monly elevated, persistent, rather thick; hypothecium dark brown, hymenium pale 
a Lich. Seand. 594. 1871. 
