202 LECA^ORA. 



b. dealbata, Tuck. ; thallus white ; disk of the apothecium 

 black. 



Eocks. Organ Mountains, Texas, and Mt. Carmel, Mexico 

 (Wright), Tuckerman Gen. 1872. Rocky Mountains, Hayden. 

 Uintah Mountains, Utah, Watson. Nevada, Lapham. Coast of 

 California, Bolander. Coast of Oregon, Hall. Missouri and 

 Kansas, Hall Arkansas, Peters. Aiken, South Carolina, Eave- 

 nel. New Jersey, Austin. Riviere du Loup, Canada, C. G. 



Pringle. As also in Chili and Bolivia, alt. 13,000 ft. Nyl. 



&, calcareous rocks. Organ Mountains, Texas, Wright. Rocky 

 Mountains, Hayden. California, Bolander. Spores, as de- 

 fined by Nylander, of about the size of those of the last species ; 

 but I find them also larger, and varying, in 6, from ovoid-ellip- 

 soid, about 3 mmm - long, and from 60-80 in number in the thekes, 

 to oblong, -|^ mic., and now only about 30 in the thekes., 



44. L. Schleicheri (Ach.) Nyl.; thallus tartareous, softish, 

 areolate-sub-lobate ; the areoles soon crowded, convex, and rii- 

 gulose; sulphur-yellow; apothecia small to middling-sized, in- 

 nate ; disk flat, dark-reddish-brown, and black, marginate ; 

 with a thin sub-crenulate thalline margin. Spores rounded; 



very minute, and numerous. Urceolaria, Ach. L. U. p. 332. 



Schcer. Spicil. p. 356. Parmelia, Fr. L. E. p. 130. 



On the earth, Rocky Mountains, alpine (Hay den, Parry, etc.), 

 Tuckerman Gen. 1872. Coast of California, at San Diego, Dr. 

 Cooper -j at Mission Dolores, Bolander. 



45. L. cervina (Pers.) Nyl.; thallus tartareous-cartilagine- 

 ous, areolate-squamulose ; scales sub-peltate, crenate-lpbate, 

 crowded more or less and finally imbricate ; from yellowish- be- 

 coming dark-livid-chestnut; apothecia smallish to middling- 

 sized, impressed becoming superficial ; the flat disk reddish- 

 brown, naked ; the entire thalline margin at length obsolete. 



Spores very minute and numerous. Nyl. Scand.p. 174. Aca- 



rospora castanea, Koerb. Parerg. p. 58. a. squamulosa, Th. Fr. 

 Scand. p. 213. 



b. thamnina, Tuckerm. ; thallus developing below into 



crowded, branched trunks which support the scales. Gen. 



Lick. p. 120. 



Rocks in the Western mountains, and on the Pacific Coast. 

 Mountains of Montana, and Nevada, Lapham. Yosemite Val- 



