SERIES 1. GYMNOCARPL 



TRIBE 1. PARMELIACEI. 



FAMILY 1. USNEEI. 



Ramalina, (Ach.) De Not. Thallus fruticulose, or pendulous, sub- 

 compressed, pale-greenish; apothecia scattered, or marginal, 

 scutellaeform. Spores colorless, bilocular. 



1. R, calicaris, (L.) Fr. Thallus tufted, rather rigid; longitudinally 



lacunose; apothecia flattish. Spores ellipsoid. 

 On oaks near Riverside; at Lemont on stony bluff, and in Will 

 County. 



2. R, calicaris, Fr., var. fraxinea, Fr. Thallus wide and long-lobed; 



apothecia lateral. 



On oaks and old fences near Lemont. 



3. R, calicaris, Fr. , var. fastigiata, Fr. Lobes short, often straw- 



colored, crowded, branched; apothecia terminal, subfastigiate. 

 Along lake shore and throughout our territory, on oaks. 



Cetraria, (Ach.) Fr., Mull. Thallus ascendant with compressed, 

 turgid, or channelled branches; or may be expanded and 

 foliaceous-membranaceous; bro'wn, yellowish, or glaucescent; 

 apothecia marginal or submarginal, scutellaeform, often dilate. 

 Spores sub ellipsoid. 



4. C, ciliaris, (Ach.) Thallus membranaceous, foliaceous, sinuate- 



laciniate; greenish or brownish; brownish beneath, fibrillose; 

 lobes crowded, often narrowed and cleft, lacunose; apothecia 

 marginal, ample; disk chestnut, margin crenulate. Spores 

 subellipsoid. Ach. L. U., p 508. Platisma, Nyl. 5, Syn. 308. 

 On old rails in Lemont Township; on old birch at Glencoe. 



5. C, aleurites, (Ach.) Th. Fr. Thallus membranaceous, foliace- 



ous, divided or cleft, isidiod, plicate at centre; beneath pale, 

 wrinkled, fibrillose; lobes sinuate-laciniate, with crenate tips; 

 apothecia marginal, granulate on the margin, 'brown, medium 

 size. Spores round. 

 On old rails near Lemont and Joliet. 



