165. Bombyliospora ] 41. CALOPLACACEAE 353 



minute to small, 0.1-0.7 mm. across, adnate, the disk flat to strongly convex, yel- 

 lowish to rusty brown or blackening, the exciple thin, colored like the disk, soon 

 disappearing; spores oblong-ellipsoid, 21-34 X 13—18 ^t. 

 On soil and over mosses, Colorado. 



5. Blastenia atrosanguinea (Merrill) Fink n. comb. 



Lecanora atrosanguinea Merrill, Ottawa Naturalist 117. 1913. B.Herrei Hasse. 



Thallus thin, scattered, minutely granulose, becoming chinky, pale greenish gray 

 to ashy; apothecia small to middle-sized, 0.5-1.25 mm. across, sessile, the disk flat, 

 reddish brown to black, the exciple thin, colored like the disk, becoming irregular 

 and wavy; hypothecium hyaline to tinged reddish; spores ovoid-ellipsoid to oblong- 

 ellipsoid, cells becoming polar, 13-19X7.5-10/1.. 



On trees, Washington. 



6. Blastenia novomexicana Fink; Hedrick, Mycologia 26:163. 1934. 



Thallus composed of minute to small, convex, greenish yellow to orange, granu- 

 lose squamules, running together into a more or less continuous crust; apothecia 

 small, 0.3-0.6 mm. across, subsessile, the disk flat to slightly convex, orange, the 

 proper exciple thin, lighter or more rarely colored like the disk; spores oblong- 

 ellipsoid, becoming 1 -septate, the cells polar, 12-16 X 6-7.5 /x. 



On rocks, near Las Vegas, New Mexico. 



7. Blastenia luteominia (Tuck.) Hasse, Cont. U.S. Nat. Herb. 17:112. 1913. 



Placodium luteominium Tuck., Lich. Calif. 18. 1866. 



Thallus thin, dirty whitish, squamulose, with the squamules strongly convex, 

 passing into granulose conditions and disappearing; apothecia small to middle-sized, 

 0.3-1 mm. across, subsessile, the disk flat to slightly convex, orange to vermilion, 

 the proper exciple well developed, of same color, entire to radiately striate; spores 

 4-12 or more, 13-23 X 3.5-5 /*,, the cells rarely polar. 



On soil, California. 



165. Bombyliospora De Not., in Mass., Ric. Lich. 114. 1852. 



Thallus crustose, smooth to powdery, granulose, minutely warty, chinky, or 

 areolate, commonly devoid of differentiation into layers, attached to the sub- 

 stratum by hyphal rhizoids; apothecia middle-sized to large, adnate to subsessile 

 or sessile, the disk flat to more or less convex, the exciple colored like the disk, 

 sometimes disappearing; hypothecium hyaline to brown; hymenium hyaline or 

 brownish above; paraphyses unbranched, septate; asci broadly clavate; spores 1-8, 

 hyaline, ellipsoid to oblong-ellipsoid, 3-1 1 -septate, the cells lenticular. 



The algal host is Protococcus. 



A Spores 2-5-septate 3. B. porphy rites 



A. Spores 5-many-septate 



B. Thallus rough, areolate to powdery; spores 40-80 X 15-24 ft . 2. B. pachycheila 



B. Thallus smooth to rough, areolate to warty; 



spores 75-110 X 20-30 /* 1. B. tuberculosa 



1. Bombyliospora tuberculosa (Fee) Mass., Ric. Lich. 116. 1852. 



Lecidea tuberculosa Fee, Essai Crypt. 107. pi. 27, f. 1. 1824. Heterothecium 

 tuberculosum (Fee) Flot. Heterothecium tubercidosum var. pachycarpum 

 (Del.) Tuck. 



Thallus smooth to rough, wrinkled, chinky to areolate and finally warty, green- 

 ish gray, often surrounded wholly or in part by a blackening hypothallus, occasion- 

 ally sulphur-colored within; apothecia middle-sized to large, 0.6-2.5 mm. or more 

 across, subsessile, the disk flat to slightly convex, reddish brown to blackish, the 

 exciple thick, paler to blackish; hypothecium reddish to brownish; spores oblong- 

 ellipsoid, 5-11-septate, 75-110X20-30/*. 



On trees, from Massachusetts to Florida, and westward to Alabama and Louisi- 

 ana. 



