168. Buellia ] 43. BUELLIACEAE 371 



24. Buellia pullata Tuck., Lich. Calif. 26. 1866. 



Thallus chinky to minutely areolate, passing into a chinky, dark greenish brown 

 crust; apothecia small, 0.2-0.6 mm. across, sessile, the disk flat to slightly convex, 

 black, becoming irregular, the exciple thin, black, prominent, disappearing; hypo- 

 thecium brownish black; spores ellipsoid, 12-18 X 5.5-9 /a. 



On rocks, Iowa, Minnesota, and California. 



25. Buellia lepidastra Tuck., Syn. N. A. Lich. 2:90,91. 1888. 

 Lecidea lepidastra Tuck., Am. Journ. Sci. II. 25:249. 1858. 



Thallus squamulose-areolate, the greenish gray to ashy areoles becoming undu- 

 late to crenate, scattered or crowded into a broken, finally crumbling crust on a 

 dark hypothallus; apothecia small, 0.3-0.5 mm. across, adnate, sometimes con- 

 glomerate, the disk flat, black, the exciple black, thick, but disappearing; hypo- 

 thecium dark brown; spores ellipsoid, 10-19 X 5.5-8 /x. 



On rocks, from New England to Alabama, and westward to Texas and Cali- 

 fornia. 



26. Buellia epigaea (Hoffm.) Tuck., Gen. Lich. 185. 1872. 



Lichen epigaeus Hoffm., Deutschl. Fl. 164. 1796. Lecidea epigaea (Hoffm.) 



Schaer. 

 Thallus lobed, white and powdery, the lobes crowded, often forming a rosette, 

 or reduced and scattered; apothecia small to middle-sized, 0.3-0.8 mm. across, 

 adnate to sessile, the disk flat and finally convex, dark brown to black, the exciple 

 prominent, white-powdery, and disappearing; hypothecium brown; spores ellip- 

 soid, 13-19 X 6.5-9 jut- 

 On calcareous soil, Nebraska, Montana, and Wyoming. 



27. Buellia bolacina Tuck., Syn. N. A. Lich. 2:88. 1888. 



Thallus granulose or subsquamulose, greenish to greenish gray or white, the 

 granules swollen, wavy, and plicate; apothecia small to middle-sized, 0.5-0.9 mm. 

 across, adnate, the disk flat to convex, black, the exciple black, and soon disappear- 

 ing; hypothecium brownish black; spores ellipsoid, 12-18 X 6-9 ft. 



On soil and rocks, California. 



28. Buellia badia (E. Fries) Mass., Mem. Lich. 124. 1855. 

 Lecidea badia E. Fries, Syst. Orb. Veg. 287. 1825. 



Thallus thin, of flat to hemispherical, brownish to greenish brown, crenately 

 lobed squamules, or in part areolate; apothecia small to middle-sized, 0.2-0.8 mm. 

 across, adnate, the disk flat to convex, black, the exciple thin, raised, black, be- 

 coming irregular, and disappearing; hypothecium brown; spores ellipsoid, 8-16 X 

 5-9 ix. 



On mosses over rocks, from South Carolina and Tennessee westward to Cali- 

 fornia and Washington. 



29. Buellia pulchella (Schrad.) Tuck., Gen. Lich. 185. 1872. 



Lichen pulchellus Schrad., Journ. Bot. St. 1. pi. 74. 1799. Lecidea Wahlenbergii 

 Ach. 



Thallus squamulose, the swollen squamules crowded into a moderately thick, 

 greenish yellow crust, becoming wavy-folded, upon a black hypothallus; apothecia 

 small to middle-sized or larger, 0.4-1 mm. across, partly immersed to subsessile, 

 sometimes clustered to confluent, the disk flat to convex, black, the exciple black, 

 becoming flexuous, thin, and disappearing; hypothecium brownish black; spores 

 ellipsoid, 10-17 X 7-10 ja. 



On rocks, New England. 



OTHER SPECIES REPORTED 



Buellia leptocline Koerb. — Oregon. 



Buellia verruculosa (Borr.) Mudd. — Maine. 



Buellia parasema var. vulgata T. Fries — Southern California. 



