96 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
yellowish below and darker above in ours; paraphyses distinct or somewhat coherent, 
rarely branched, commonly enlarged and brownish toward the apex; asci clavate or 
narrowly clavate; spores brown, ellipsoid, 9 to 13 long and 8 to 6 » wide. 
Collected on the northern boundary at Rainy Lake City. On the thallus of 
Baeomyces byssoides, 
Elsewhere in North America in Vermont and Newfoundland, Known also in 
Europe. 
8. Buellia inquilina Tuck. Lich. Calif. 32. 1866. 
Parasitic and no thallus discernible except that of the host; apothecia minute, 0.2 
to 0.6 mm. in diameter, sessile or somewhat immersed, the disk black or brownish 
black, flat or somewhat convex, the exciple black and prominent or finally disappear- 
ing in ours; hypothecium dark brown; hymenium pale; paraphyses rarely branched, 
commonly thickened and brownish toward the apex; asci clavate; spores brown, 
ellipsoid, 10 to 18 » long and 6 to 8 » wide. 
Collected at Warroad, on the northern boundary. On Lecanora cinerea, the host thus 
differing from that of Tuckerman, as likewise the plant differs somewhat in form and 
size of the apothecia. 
Known elsewhere in Pennsylvania, North Carolina, South Carolina, and Texas. A 
strictly North American lichen. 
9. Buellia parmeliarum (Sommerf.) Tuck. Syn. N. A. Lich. 2: 106. 1888. 
Lecidea parmeliarum Sommerf. Suppl. FI. Lapp. 176. 1826. 
Parasitic, and no thallus discernible except that of the host, this commonly distorted 
and forming small tufts and lobules of unusual form, the color also often changed; 
apothecia minute, 0.2 to 0.5 mm. in diameter, the disk black or brownish black, flat 
or more commonly convex, the exciple prominent and black but commonly disap- 
pearing; hypothecium brown, varying toward blackish; hymenium pale to pale 
brownish below and brownish or brown above; paraphyses sometimes branched, com- 
monly enlarged and brownish toward the apex; asci cylindrico-clavate; spores oblong- 
ovoid to ellipsoid, brown, 10 to 15 pe long and 3 to 6 » wide. 
Common in the northern portion of the State. On Parmelia saxatilis and P. borreri 
on cedars in swamps. 
Elsewhere in North America in New England, Nebraska, California, and Newfound- 
land, and at Bering Strait. Known also in Europe and Africa. 
10. Buellia parasitica (Floerke) Tuck. Gen. Lich. 188. 1872. 
Lecidea parasitica Floerke, Deutsch. Lich. no. 101. 1819. 
Parasitic and showing no thallus except that of the host plant; apothecia minute, 0.2 
to 0.6 mm. in diameter, sessile, the disk flat or rarely becoming slightly convex, black 
and oftener variously plicate when the apothecium becomes irregular in form, the 
exciple thin and rarely disappearing in the plicate and irregular forms; hypothecium 
dark brown; hymenium commonly pale below and brown or brownish above; para- 
physes simple or rarely branched, frequently enlarged and brownish toward the apex; 
asci clavate; spores 4-celled, brown, ellipsoid or oblong, 10 to 16 fe long and 3 to 6 x 
wide. 
Collected in the northern part of the State at Oak Island, Harding, and Tower. On 
Pertusaria communis and Lecanora pallescens. 
Also known in North America in California and Oregon, and at Bering Strait. Found 
also in Europe and New Zealand, 
11. Buellia glaucomaria (Nyl.) Tuck. Syn. N. A. Lich. 2: 108. 1888. 
Lecidea glaucomaria Ny]. Nya Bot. Notis. 177. 1852. 
Parasitic and showing no thallus except that of the host plant; apothecia minute, 
0.25 to 0.65 mm. in diameter, sessile, sometimes clustered and heaped, the disk flat 
and black, the exciple thick and seldom disappearing; hypothecium dark brown; 
