THE LICHEN-FLORA OF CHICAGO AND VICINITY. 35 



This widely diffused species occurs in our county on hickories 

 and oaks. It is variable, and a number of varieties, fourteen 

 or more, have been created species. Each has an extensive 

 synonomy. 



91. B< iusco-fubella, Hoffm. Thallus granulate, rugose, chinky, 

 ash-colored; apothecia medium size, sessile, flat; disk often 

 turgid, rust-colored, chestnut, or even black, Bacidia, Th. 

 Fr. Scand. 346. Lecidea spadicea, Ach. Syn. L. 34. Tuck. 

 Syn. Pt. 2. 43. (Var. b.) 



In same localities as the preceding species. 



92. B, suffusa, Fr. Thallus the same as in No. 91. Apothecia 

 ample, reddish brown, suffused partially or wholly with white; 

 disk rufescent, becoming darker, turgescent, excluding the 

 margin, suffused with white. Tuck. Gen. Lich. 166. (Var. 

 c.) Tuck. Syn. Pt. 2. 43. 



On hickories in Hanover, Cook County, and near Lemont and 

 Joliet. 



93. B, inundata, Fr. Thallus scurfy, greenish, rimose-areolate; 

 apothecia minute, sessile or adnate, flat or convex; tumid- 

 brownish, black, often excluding the margin; hypothecium 

 pale. Spores slender. Secoliga, Stizenb. Bacidia, Koerb. 

 Biatora. Tuck. Syn. Pt. 2. 45. 



In all our territory on detached rocks or stones along streams; 

 the thallus is best shown on sandstones. 



94. B, cyphalea, Tuckerm. Thallus thin granulosa, cinerascent; 

 apothecia small, dark reddish or rust-colored. Tuck. Syn. Pt. 

 2. 51, and Gen. L. 168. 



Rare on elms near the Fox River; may be found elsewhere. 



Lecidea, (Ach.) Fr. Tuckerm. Thallus various, crustaceous, 

 squamulose or evanescent; apothecia patellaeform, horny. 

 Spores colorless. Fr. L. E. Tuck. Syn. 



95. L, enteroleuca, Fr. Thallus granulose and cinerascent, often 

 wanting; apothecia small to large, adnate, convex, often ex- 

 cluding margin, black. Spores ovoid-ellipsoid. Fr. L. E. 

 331. Tuck. Syn. N. E. 67. Nyl. Scand. 217. 



