374 43. BUELLIACEAE [ 171. Buelliopsis 



wrinkled; hypothecium brownish black; spores ellipsoid, 3-septate, 11-16 X 4.5-7 /a. 

 On the thallus of Lecanora tartarea, near New Bedford, Massachusetts. 



4. Leciographa pertusaricola (Willey) Fink n. comb. 



Buellia pertusaricola Willey, in Tuck., Syn. N. A. Lich. 2:108. 1888. 



Thallus imbedded in the host and invisible; apothecia minute to small, 0.2-0.5 

 mm. across, immersed to adnate, the disk concave, black, the exciple thick, black; 

 hypothecium blackish brown; spores 30-50, ellipsoid, 1-3-septate, 5-8 X 2-2.5 /a. 



On the thallus of Pertusaria communis on rocks, Massachusetts and Nebraska. 



171. Buelliopsis Schneid., Text. Gen. Lich. 136. 1897. 



Thallus crustose, sometimes granulose and variously rugose, warty, chinky 

 and verrucose, mainly above the substratum and attached by hyphal rhizoids; 

 apothecia immersed to adnate, sometimes flexuous, the disk flat to convex, com- 

 monly brown to black, the exciple dark-colored and usually persistent; hypothecium 

 brown to black ; hymenium hyaline to brownish above ; paraphyses rarely branched, 

 usually enlarged and brownish toward the apex; asci clavate to cylindrico-clavate; 

 spores 8, brown, ellipsoid, fusiform or dactyloid, 3-septate, sometimes tardily so. 



The algal host is Protococcus. 



A. Thallus whitish; spores 18-30 X 7-13 /a 1. B.papillata 



A. Thallus greenish to yellowish gray; spores 12-15 X 4-5.5 /u, . . .2. B.vernicoma 



1. Buelliopsis papillata (Sommerf.) Fink n. comb. 



Lecidea papillata Sommerf., Suppl. Fl. Lapp. 154. 1826. Buellia papillata 

 (Sommerf.) Tuck. Buellia papillata var. albocincta T. Fries. 



Thallus minutely granulose, whitish to white, the granules forming thin to 

 thicker crust, becoming chinky, wrinkled, warty and crumbling; apothecia small 

 to middle-sized, 0.3-0.8 mm. across, adnate, often clustered and confluent, the 

 disk flat to convex, black, the exciple black, thin, and disappearing; hypothecium 

 brownish black; spores 1-3-septate, ellipsoid, 18-30 X 7—13 /a. 



On mosses, Rocky Mountains and Washington. 



2. Buelliopsis vernicoma (Tuck.) Schneid., Text. Gen. Lich. 136. pi. 15, f. 5. 



1897. 



Lecidea vernicoma Tuck., Am. Journ. Sci. II. 25:429. 1858. Buellia vernicoma 

 Tuck. 



Thallus minutely granulose, greenish to yellowish gray, the granules round, 

 scattered, or crowded into a thin, chinky crust, surrounded wholly or in part by 

 the blackish hypothallus; apothecia minute to small, 0.15-0.45 mm. across, adnate, 

 the disk flat to slightly convex, black, the exciple thin, black, at length flexuously 

 irregular; hypothecium blackish brown; spores ellipsoid, 3-septate, 12-15 X 4-5.5 /a. 



On trees and rocks, New England, New Jersey, Pennsylvania, South Carolina, 

 and Alabama. 



172. Rinodina Ach.; S. F. Gray, Nat. Arr. Brit. PI. 1:448. 1821. 



Thallus crustose, granulose, areolate, or rarely squamulose, sometimes lobed, 

 closely adnate, attached to the substratum by hyphal rhizoids, differentiated into 

 a poorly developed cortical layer of bent and branched hyphae or in the squamu- 

 lose forms appearing to be more or less plectenchymatous, a thin algal layer and 

 a more or less developed medullary layer of loosely interwoven hyphae; apothecia 

 minute or small to middle-sized, more or less immersed to adnate or sessile, the 

 disk slightly concave or flat to more or less convex, brown to black or pruinose, 

 the exciple colored like the thallus, irregular, sometimes disappearing; hypothecium 

 hyaline to brownish; hymenium hyaline or brownish above; paraphyses rarely 

 branched; asci clavate to inflated-clavate; spores 8- rarely 16-24, brown, 1- rarely 

 3-septate. 



The algal host is Protococcus. 



