142 



GEOLOGY OF LA SALLE COUNTY. 



C. pulchella. Schwein.^ Apothesia scarlet. In 



. .woods of .the Illinois. 

 C, uncialis, Iv , Fr. ApotJiecia brown. On earth, 

 - Deer Park. 



C. cariota, Ach., Spreng-. Apothtcia brown, thal- 

 1;^' : lus much like that of C. squamosa. On mossy 



_ / earth on the Vermillion. . 

 . C. symphycarpa, Fr. Apothecia brow^n, thallus 

 rather elongated. On mossy earth, Deer Park. 

 MYRIANGIUM, Mont, and Berk.^ Thallus cellulose, 

 orbiculate, plicate-striate at the circumference, 

 . . nodulose, apothecia lecanoroid. Spores oblong-- 

 ovoid.-;/. 



M. duri^i, M. & B., Tuckerm.. Thallus crustace- 

 , ous, adnate, becoming free, fuscous, apothecia 

 elevated, blackish, disk w^th depressed, entire 

 margin. M. curtisii, M. & B. On corylus. Its 

 position has never been settled by any one defi- 

 nil ely. 



LECIDFFI. 



BIATORA, Fr. Thallus various or deficient, apo- 

 thecia diverse in color, becoming soft and swol- 

 len w^hen wet. Spores ellipsoid and simple, or 

 ' assuming different forms, colorless, numerous. 

 B. coarctata, Ach., Th. Fr. Thallus cinereous, of 

 minute squamules, rimose-areolate, apothecia 

 small, fuscous or blackish, connivent or open, 

 sometimes flat. Spores ovoid-ellipsoid. Leci- 

 dea. Nyl. Scand. 196. Tuck. Syn. Pt. 2. 15. 

 Parmelia, Fr. L. E. 104. On calcareous and 

 arenaceous rocks. On Baldwin farm near the 

 Vermillion. Very fine. 

 B. vdrians, Ach. Thallus of minute granules 

 compacted into a yellowish or greenish crust. 



