204 LECANORA. 



Parm. cervina, v. discreta, Fr. L. E. p. 127. Acarospora sma- 

 ragdula, Auctt. 



c. Sinopica, Schser.; the last, tinged red by oxide of iron. 

 Nyl. I. c. 



d. oligocarpa, Nyl. ; spores much larger, and reverting finally 



to the normal number, in the thekes. Acarospora glebosa, 



Koerb. Syst. p. 156. L. cervina, v. glebosa, Tuckerm. Gen. p. 121. 



Granitic rocks, a, b, Arctic America (Richardson), Hooker 



1. c. 1823. b, throughout the northern and middle States, 



common ; and west to Kansas, Hall ; and California, Bolander. 

 c, alpine rocks, White Mountains, Tuckerman. d, Cali- 

 fornia, Bolander. 



45(<i). L.privigna (Ach.) Nyl. ; thallus deficient ; apothecia 

 small to minute, sessile, appressed; scattered or crowded densely 

 into clumps; orbicular becoming variously difform (angulate, 

 lirellate), the dark-red disk finally black ; bordered by an ele- 

 vated, persistent, black margin ; and finally rugged and con- 

 torted. Spores ellipsoid, very numerous and minute. Le- 



cidea, Ach. Meth. p. 49. Sarcogyne, Koerb. Syst. p. 266, a. 

 Lecanora simplex (Dav.) Nyl. Biatorella, Th. Fr. Scand. p. 407. 



b. pruinosa, Auctt. ; apothecia small to middling, scattered, 

 appressed, or now sunken in the matrix ; the rather convex disk 



gray-pruinose. Sarcogyne, Koerb. I. c. Lecanora, Nyl. Scand. 



p. 176. 



c. Clavus, Koerb. ; apothecia middling to ample ; short-stipi- 

 tate, rounded, becoming wavy and difform ; disk reddish and 

 blackening, naked; the thick, wrinkled, and chinky margin 

 finally disappearing; the hypothecium at length blackening. 

 Koerb. Syst. p. 266. Biatorella, Th. Fr. Scand. p. 409. Le- 

 canora cervina, v. eucarpa, Nyl. Stereopeltis Carestice, De Not. 

 (Anz. Langob. n. 381.) 



d. revertens, Tuck, ; apothecia not unlike those of the last, 

 but smaller and more regular; with thinner margin. Spores 

 few, and at length in 8 s , in the thekes ; ellipsoid, and oblong- 

 ellipsoid, -^ mic. Gen. Lich. p. 122. 



Rocks, a, granitic, from Canada, Drummond, and the north- 

 ern States, to Tennessee, Ravenel, Alabama, Peters, and Cali- 

 fornia, Bolander. b, limestone, Canada, Drummond. New 



