FINK—THE LICHENS OF MINNESOTA, 181 
frequently brownish above; paraphyses simple or rarely branched toward the apex, 
there sometimes enlarged and darker; asci clavate; spores ellipsoid or oblong-ellipsoid, 
10 to 14 » long and 4 to 7 » wide. 
Generally distributed over the State. On trees and old wood and rarely on rocks. 
The species is distributed throughout North America. Known also in all of the 
grand divisions. 
lla. Lecanora varia symmicta Ach. Lich. Univ. 379. 1810. 
Thallus thin, smooth or becoming subleprose, most commonly yellowish; apothecia 
becoming convex and the exciple entire or disappearing, the disk of the usual colors 
or blackening. 
Generally distributed over the State. On old wood, especially old boards. 
The plant has a general North American distribution. Known also in Europe and 
Asia. 
11b. Lecanora varia saepincola (Ach.) Nyl. Not. Sallsk. Faun. Flor. Fenn. 
5: 164. 1861. 
Lecidea saepincola Ach. Syn. Lich. 35. 1814. 
Thallus thick, more or less granulate-roughened, of same color as the last; apo- 
thecia of the usual size, the disk convex and reddish-olivaceous or black, slightly 
pruinose, the exciple commonly absent and the apothecia biatoroid. Apothecia 
frequently lighter-colored in ours. 
Recorded only from the northern portion of the State, but no doubt also occurring 
farther south. On old wood. 
Not so frequently reported as the last, but still widely distributed in North America. 
Known also in Europe. 
12. Lecanora polytropa (Hoffm.) Schaer. Enum. Lich. Eur. 81. 1850. 
Verrucaria polytropa Hoffm. Deutsch. Fl. 2: 196. 1795, 
Thallus crustose or subsquamulose of small squamules, thicker than in the last, 
somewhat roughened and chinky or becoming subareolate, or rarely even heaped- 
granulate, the crust continuous or scattered over larger or smaller areas, or sometimes 
disappearing, pale sea-green varying toward yellowish; apothecia small or scarcely 
middle-sized, 0.5 to 1.3 mm. in diameter, adnate, the disk flat with an entire, flexu- 
ous, or subcrenulate exciple, or even becoming convex and the exciple disappearing, 
somewhat darker-colored than the thallus or scarcely differing; hypothecium and 
hymenium pale; asci clavate; paraphyses simple or rarely branched toward the very 
slightly enlarged and colored apex; spores ellipsoid, 10 to 13 » long and 5 to 6 » wide. 
Easily confused with forms of Lecanora muralis. 
Reported from several localities in the northwestern portion of the State, and no 
doubt to be found farther east also. On rocks. 
Elsewhere in North America in the mountains of New England and California and 
northward to arctic America. Known also in South America, Europe, and Asia. 
Lecanora varia polytropa is the synonym of the preliminary reports. 
12a. Lecanora polytropa melaena Hedl. Bih. Svensk. Vet. Akad. Hand]. ism™-$ 
3: 38. 1892. 
Thallus composed of contiguous or scattered, entire or subcrenate areoles or squam- 
ules; apothecia immersed or more or less superficial, scarcely reaching | mm. in 
diameter; the disk flat or becoming convex or even subglobular. 
A single collection was made in 1903 on Mount Josephine at Grand Portage. On 
rocks. | 
Not previously reported from North America. Found in the Scandinavian Penin- 
sula in Europe. 
