40. Coniocybe] 11. CALICIACEAE 73 



cal to lens-shaped, the disk convex to flat, and this and the exciple dark brown 

 to dull black; spores brown to blackish brown, oblong, 6-11 X 2.5-3.5 p. 

 On the thallus of Lecidea lucida, White Mountains, New Hampshire. 



2. Caliciella pallidella (Willey) Fink n. comb. 



Calicium pallidellum Willey, Enum. Lich. New Bedford, Mass. 35. 1892. 



Thallus imbedded in that of the host and therefore invisible; stipes very short 

 to short, brownish to black; apothecia minute, 0.05-0.1 mm. across, subspherical, 

 the disk convex to flat, dull black; spores 6-10 X 3-5 /a. 



On thallus of Pertusaria velata, Massachusetts. 



Available material very scanty, the description adapted from Willey. 



40. Coniocybe Ach., Vet. Akad. Handl. 1816:283. pi. 8, f. 16. 1816. 



Thallus rudimentary, without cellular cortex, crustose, smooth to more or less 

 scurfy, persistent and well developed or disappearing; stipes slender, rather long; 

 apothecia minute to middle-sized, spherical to top-shaped, the disk convex, yel- 

 lowish or white to light brown, the exciple of the same color, sometimes disappear- 

 ing; hypothecium hyaline to brownish; hymenium hyaline below to usually 

 brownish above; paraphyses usually branched; asci cylindrical; spores 8, hyaline, 

 spherical to oblong, non-septate. 



The algal hosts are Protococcus and Stichococcus. 



A. Spores oblong 3. C. gracilescens 



A. Spores spherical 



B. Thallus ashy gray; stipes whitish to yellowish or brownish above . 2. C. pallida 



B. Thallus greenish yellow; stipes ashy yellow to sulphur-colored . 1. C. furfuracea 



1. Coniocybe furfuracea (L.) Ach., Vet. Akad. Handl. 1816:288. 1816. 

 Mucor furfuraceus L., Sp. PI. 1185. 1753. 



Thallus well developed, scurfy-powdery, greenish yellow, sometimes becoming 

 thin or disappearing; stipes slender, rather long, powdered, ashy yellow to sulphur- 

 colored; apothecia small to middle-sized, 0.2-0.45 mm. across, spherical, the disk 

 convex, yellow to light brown, the exciple ashy yellow to sulphur-colored; spores 

 2.5-3 p in diameter. 



On roots of decayed trees, dead twigs, decayed mosses, and rarely on rocks, 

 New England, New York, Ohio, Wisconsin, California, and Washington. 



2. Coniocybe pallida (Pers.) E. Fries, Sched. Crit. Lich. Exsicc. Suec. fasc. 1. 



3. 1824. 



Calicium pallidum Pers., Ann. Bot. Usteri 7:20. pi. 3, f. 1, 2. 1794. 



Thallus thin, ashy gray, often widespread, sometimes disappearing; stipes 

 slender, rather long, whitish to yellowish, often brownish toward the top; apothe- 

 cia minute to small, 0.15-0.3 mm. across, spherical top-shaped, the disk usually 

 convex, whitish to light brown; the exciple of the same colors; spores spherical, 

 3-7 fi in diameter. (Plate 2 b.) 



In depressions of rough-barked trees, New England, New York, Illinois, Iowa, 

 Minnesota, and Washington. 



3. Coniocybe gracilescens Willey, Enum. Lich. New Bedford, Mass. 35. 1892. 

 Thallus very thin and mainly inconspicuous, sometimes showing as minute, 



scattered, yellowish green granules; stipes yellow, short to longer, slender to 

 somewhat enlarged toward the tip; apothecia minute, 0.05-0.15 mm. across, spher- 

 ical to top-shaped, the disk convex, yellow, the exciple of the same color; spores 

 oblong, 5.5 X 2 /a. 



On old wood, Massachusetts. 



