234 PROCEEDINGS OF THE AMERICAN ACADEMY 



64. P. vitellina, Ach. Cr. tartareous, granulose-coacervate, dark- 

 reddish-yellow; hypoth. macular, white; apoth. sessile, disk yellow 

 becoming fuscous, margin simple, thin, erect, entire, at length of the 

 same color. Fr. Lichenogr. p. 162. Lecanora, Ach. 



Dead wood and rocks ; New England, Pennsylvania, Muhl. 



65. P. fulva, Schwein. (sub Lecanora). Cr. cartilagineous, chinky 

 and granulate-verrucose, sulphureous or pallescent, upon a blackish 

 hypothallus ; apoth. sessile, disk reddish-orange, immarginate, with a 

 thick, inflected, at length flexuous margin. Lecanora fulva, Schwein. 

 in Hals. Lich. N. Y. I. c. p. 13. Tuckerm. Lich. N. E. I. c. 



Trunks ; New England. New York, Halsey. 



66. P. cerina, Ach. Cr. at first contiguous, at length granulate, ci- 

 nereous, upon a bluish-black hypothallus ; apoth. sessile, disk immar- 

 ginate, somewhat wax-colored, with a thin, equal, opake, entire thai- 

 line margin. Fr. Lichenogr. p. 160. Lecanora, Ach. 



Trunks, rocks, and stones ; New England. Pennsylvania, Muhl. 



Subsect IX. Urceolakia, Fr. 



67. P. glaucoma, Ach., Fr. Crust tartareous, contiguous, rimose- 

 areolate, glaucous-white ; hypothallus white ; apothecia innate, disk 

 pale-flesh-colored, pruinose, at length convex, and becoming blackish, 

 with a very entire, evanescent thalline margin. Fr. Summ. Fl. Scand. 

 P. sordida, Fr. Lichenogr. p. 178. Lecanora glaucoma, Ach. 



Rocks (especially granite). New York, Halsey. Arctic America, 

 Rich. 



68. P. verrucosa, Ach., Fr. Cr. cartilagineous, verrucose, naked, 

 glaucous-white ; hypoth. white ; disk immersed in the verrucse, con- 

 cave, blackish, subpruinose, the proper margin connate with the convex 

 thalline margin. Fr. Lichenogr. p. 186. Icon, Laur. in Sturm''s Fl. 

 t. 21. — a. Urceolaria, Fr. ; normal. Urceolaria verrucosa, Ach. — 

 /?. Pertusaria, Fr. ; verrucse closed, disk prominent like a black osti- 

 ole. Porina glomerata, Ach. 



Incrusting dead mosses and sticks, in alpine districts ; White Moun- 

 tains. 



69. P. calcarea, Ach., Fr. Cr. subcariilagineous, areolate-verru- 

 cose, glaucescent (often mealy and white) ; disk immersed in the are- 

 olse, from concave becoming plane, blackish, cfesious-pruinose, with a 



