28 THE CHICAGO ACADEMY OF SCIENCES. 



55. L. hageni, Ach. , var. sambuci, (Pers.) Nyl., L. Sambuci, Nyl. 

 Th. Fr. 



Found rarely on elms, poplars and shrubs in Will County. 



56. L. varia, (Ehrh.) Nyl. Thallus verruculose, greenish or yel- 

 lowish; apothecia small, the disk yellow to flesh-color or 

 rufescent, thin; margin entire or crenulate, often excluded. 

 Spores oblong-ellipsoid. Nyl. Scand. 163. 



On oaks near Elgin, Lemont and elsewhere. There are 

 numerous varieties. 



57 L, varia, (Ehrh.) Nyl., var. symmicta, Ach. Thallus thin, 

 whitish; apothecia yellowish, disk swollen, excluding margin; 

 biatoroid. Fr. L. E. Nyl. Tuck. Syn. 

 On various trees. 



58. L, calcarea, Sommerf. Thallus white, contiguous; apothecia 

 innate, emerging; disk grey-pruinose. Spores ovoid-ellipsoid. 

 Nyl. Scand. 154. 



On calcareous rocks at Joliet. 



59. L, calcarea, Sommerf., var. contorta, Fr. Areoles discrete, pale 

 lead-color. L, calcarea, f. Hoffmani, Nyl. , 



On calcareous rocks at Joliet. A very curious form. 



60. L, cervina, (Pers.) Nyl. Thallus tartareous, areolate, squam- 

 ulose; scales sub-peltate, from yellowish to chestnut; apoth- 

 ecia medium size, impressed, becoming superficial; disk 

 reddish-brown, thalline margin obsolete. Nyl. Scand. 174. 

 Tuck. 202. 



On detached sandstones in Cook and Will Counties. 



61. L, privigna, (Ach.) Nyl. Thallus wanting; apothecia varying 

 from small to large; sessile, appressed; scattered or aggre- 

 gated; disk dark red; margin elevated, rugged, contorted. 

 Spores numerous, minute Lecidea, Ach. M. L. 49. 

 Sarcogyne, Koerber, Syst. 266. Biatcrella, Th. Fr. Scand. 

 407. 



Found on calcareous pebbles near Elgin, on rocks near Joliet. 



