214 PROCEEDINGS OF THE AMERICAN ACADEMY 



2. S. crocata, Ach. Th. submembranaceous, scrobiculate, greenish- 

 glaucous-fuscescent ; on the under side lanuginous, livev-colored at 

 the circumference, with minute, pale-lemon-colored cyphellse ; laciniae 

 short, rounded, crenulate, with yellowish-pulverulent margins; ' apoth. 

 scattered, fuscous-black.' Delis. Stict. p. 56. 



Rocks among mosses, New England, infertile ; less common in the 

 Northern mountains. S. Feei^ Delis. 1. c. p. 44, from North America, 

 is perhaps a Southern species. 



3. S. syloatica, Ach. Th. coriaceous-membranaceous, laciniate-lobed, 

 lacunulose, greenish-fuscous ; tomentose, and subfuscous-cinerascent 

 beneath, with urceolate, whitish cyphellse ; lobes somewhat truncate, 

 rounded, crenulate ; ' apoth. marginal, peltate, rufous-fuscous.' Fr. 

 Liclienogr. ^.51. 



Rocks, among mosses. Pennsylvania, MuhL, New York, Halsey. S. 

 fuliginosa, Ach., differs principally in its round-lobed, rugose fronds, 

 frequently isidioid-efflorescent, and its (normal) sessile, orbiculate apo- 

 thecia. The described apothecia of S. sylvatica depend upon the figures 

 of Dillenius, Wulfen, &c. The species is now unknown in a fertile state. 



4. S. quercizans, Ach. Th. cartilagineous, laciniate, plane, pale-ru- 

 fous-fuscous ; somewhat tomentose, and subfuscous-nigrescent beneath, 

 with urceolate (membranaceous), whitish cyphellae ; lobes subimbricate, 

 oblong, rounded, crenulate ; ' apoth. scattered, disk somewhat concavo- 

 plane, with a thin entire margin.' Delis. Slid. p. 84. Lobaria, Michx. 



Pennsylvania, Herb. Montague ! Mossy rocks. New York, Russell! 

 The specimens from Mr. Russell seem to me to differ from S. sylvatica 

 in the characters indicated by Delise, and to agree with his S. querci- 

 zans, as they also do with my brief notes on the specimen (from Car- 

 olina) in herb. Michaux. S. Beauvoisii, Delis. 1. c. p. 83, constituted 

 on a North American Lichen, seems hardly distinct from the present. 



5. S. scrobiculata, Ach. Th. coriaceous, suborbiculate, lax, scro- 

 biculate, leaden-gray (and glaucescent) ; lanuginous on the under side, 

 with naked, white spots; lacinise rounded, somewhat entire (commonly 

 sorediiferous) ; ' apoth. scattered, from rufous becoming fuscous.' Fr. 

 Lichenogr. p. 53. 



Trunks, and rocks among mosses, New England ; infertile. North- 

 ward to Newfoundland, Pylaie. S. Umbata, Ach., a species resembling 

 this, but with urceolate, true cyphellse, very possibly occurs with us. 



6. S. anthraspis, Ach. Th. cartilagineous-membranaceous, lacu- 



