70 11. CALICIACEAE [37. Calicium 



B. Exciple yellowish- or bluish-green to darker 



C. Spores &-12 X 2.5-4.5 /i 9. C. roscidum trabinellum 



C. Spores 9-18 X 4-8 fi 9. C. roscidum 



1. Calicium hyper ellum Ach., Meth. Lich. 93. 1803. 

 Lichen hyperellus Ach., Lich. Suec. 85. 1798. 



Thallus greenish yellow to yellowish gray, scurfy-granulose, well developed and 

 continuous to thinner and more or less scattered; stipes of medium length, brown- 

 ish black to black; apothecia minute to small, 0.15-0.3 mm. across, subspherical to 

 top-shaped, the disk convex to flat, black, the exciple brownish black; hypothecium 

 brown; spores dark brown, oblong-ellipsoid, 10-15 X 5-8 ai. 



On trees, California, Oregon, Idaho, and Washington. 



2. Calicium leucochlorum Tuck., Proc. Am. Acad. 5:389. 1862. 



Thallus granulose, the yellow to yellowish gray granules subcontiguous and 

 forming a thin, uneven crust, intersected more or less by the black hypothallus; 

 stipes middle-length, stout and black; apothecia clavate-top-shaped, minute to 

 small, 0.15-0.4 mm. across, the disk convex to flat, dark brown to blackish, the 

 exciple dark rust-colored; spores brown, oblong, 10-14 X 7.5-8 /a. 



On old wood, Florida. 



3. Calicium lenticulare (Hoffm.) E. Fries, Corp. Fl. Suec. 1:283. 1835. 

 Trichia lenticularis Hoffm., Veg. Crypt. 2:16. pi. 4, f. 3. 1790. C. subcinereum 



Nyl. C. viride Tuck. C. quercinum Pers. 



Thallus ashy to white, smooth to scurfy-granulose, sometimes disappearing; 

 stipes of moderate length, brownish black to black; apothecia small, 0.2-0.4 mm. 

 across, subspherical to top-shaped or lenticular, the disk flat to strongly convex, 

 blackish brown, or more or less- white-pruinose, the exciple of same colors; hypo- 

 thecium dark brown ; spores ellipsoid, 5-9 X 3-5 /a. 



On trees and old wood, New England, New York, Ohio, Illinois, and Minne- 

 sota. 



4. Calicium abietinum Pers., Tent. Disp. Meth. Fung. 59. 1797. 



C. curtum Borr. & Turn. 



Thallus ashy, thin, granulose, sometimes disappearing; stipes thin to stout, 

 short to middle-length, black; apothecia minute to small, 0.2-0.4 mm. across, the 

 disk convex to flat, dark brown to black, sometimes pruinose, the exciple of the 

 same colors and likewise sometimes pruinose; spores blackish brown, 1 -septate, 

 ellipsoid, 7-12 X 4-6 /a. 



On trees and old wood, New England, Illinois, Minnesota, and California. 



5. Calicium trachelinum Ach., Lich. Univ. 237. 1810. 



C. claviculare var. trachelinum Ach., Meth. Lich. 91. 1803. C. salicinum Pers. 



Thallus ashy, thin, granulose, commonly disappearing; stipes of medium size, 

 becoming somewhat elongated, brownish black to black; apothecia small, 0.2-0.5 

 mm. across, subspherical to top-shaped, the disk convex to flat, brown to brownish 

 black, the exciple brown; hypothecium dark brown; spores brown to blackish 

 brown, ellipsoid, constricted, 7-12 X 3-5 /a. 



On decorticate trees, from New England to Florida, and westward to Missouri, 

 Minnesota, and Oregon. 



6. Calicium Curtisii Tuck., Am. Journ. Sci. II. 28:201. 1859. 

 C. Curtisii var. splendidula Merrill. 



Thallus black, cottony, or rudimentary and disappearing; stipes short, white 

 to reddish or black; apothecia minute, 0.05-0.1 mm. across, top-shaped, the disk 

 and the exciple black and shining; spores finally 1-septate, oblong, 11-17 X 4-7 /a. 



On trees, New England, New York, Florida, and probably in Virginia, Mon- 

 tana, and California. 



