72 11. CALICIACEAE [39. Caliciella 



2. Mycocalicium albonigrum (Nyl.) Fink n. comb. 



Calicium albonigrum Nyl., Syn. Meth. Lich. 1:159. 1858. Calicium subtile var. 

 albonigrum (Nyl.) Willey. 



Thallus very thin, whitish, becoming scurfy; stipes of medium length; apothe- 

 cia small, 0.2-0.4 mm. across, subspherical to top-shaped, the disk convex, brown- 

 ish black, the exciple darker; hypothecium brown; spores blackish brown, oblong- 

 ellipsoid, 6-8 X 2.5-3.5 /x. 



On trees, New England, New York, Alabama, Texas, and California. 



3. Mycocalicium fuscipes (Tuck.) Fink n. comb. 



Calicium fuscipes Tuck., Gen. Lich. 240. 1872. 



Thallus poorly developed and evanescent; stipes slender, dark brown, shading 

 into white above; apothecia minute to small, 0.15-0.25 mm. across, lens-shaped to 

 top-shaped, the disk convex, black, the exciple white below to black above; spores 

 oblong-ellipsoid, 9-15 X 4-7 fi. 



On old wood, New Jersey. 



4. Mycocalicium Ravenelii (Tuck.) Fink n. comb. 



Calicium Ravenelii Tuck.; Nyl., Not. Sallsk. Faun. Fl. Fenn. 5:42. 1861. 



Thallus granulose, greenish gray; stipes short, stout, brownish black; apothecia 

 middle-sized, 0.3-0.5 mm. across, spherical to top-shaped, the exciple dark, in- 

 curved, radiate-striate; spores ellipsoid to fusiform-ellipsoid, brownish, 7-12 X 3-5 /x. 



On old wood, South Carolina. 



5. Mycocalicium microcephalum (J. E. Smith) Fink n. comb. 



Lichen microcephalus J. E. Smith, Engl. Bot. 26:1865. 1808 pro parte. Calicium 

 microcephalum (J. E. Smith) Ach. 



Thallus thin, obscurely granulose, greenish gray to olive-brown, often disappear- 

 ing; stipe very short, dark-colored; apothecia minute to small, 0.2-0.5 mm. across, 

 spherical varying toward top-shaped, the disk and the exciple black; spores sub- 

 spherical to ovoid-ellipsoid, 8-13 X 6-9 ^. 



On old wood, New England. 



6. Mycocalicium disseminatum (Ach.) Fink n. comb. 



Cyphelium disseminatum Ach., Vet. Akad. Handl. III. 5:227. pi. 1, f. 4. 1817. 

 Chaenotheca disseminata (Ach.) Lettau. 



Thallus thin, scurfy, greenish to greenish gray, often scarcely visible; stipes 

 very short; apothecia minute, 0.15-0.25 mm. across, hemispherical, the disk con- 

 cave to flat, black or tinged green, the exciple black; spores blackish, oblong, 

 10-14 X 4-6 [x, said to be rarely spheroidal. 



On old wood, White Mountains, New Hampshire, and California. Seems near 

 Caliciella. 



39. Caliciella Vainio, Acta Soc. Faun. Flor. Fenn. 57:52. 1927. 



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

 to moderately long; apothecia minute to small, subspherical to lenticular, convex 

 to becoming flat, the exciple thin, colored like the disk; hypothecium hyaline to 

 brownish; hymenium hyaline or brownish above; paraphyses short, threadlike; 

 asci cylindrico-clavate; spores 8, brown, oblong to ellipsoid, 1 -septate. 



The algal host is Protococcus. 



A. Stipes very short to short ; apothecia minute, reaching 



0.1mm. across 2. C.pallidella 



A. Stipes longer; apothecia larger, reaching 0.6 mm. across .... 1. C. arenaria 



1. Caliciella arenaria (Hampe) Fink n. comb. 



Cyphelium arenarium Hampe, in Mass., Misc. Lich. 20. 1856. Calicium citri- 

 num (Leight.) Nyl. 



Thallus imbedded in the host and therefore invisible; stipe moderately long, 

 stout, rusty brown; apothecia small to middle-sized, 0.4-0.6 mm. across, subspheri- 



