AND BRITISH AMERICA. 21 



1, p. 476), Flotow (Ibid. p. 613), Fee (Crypt. Exot. 1. c), and J. D. 

 Hooker (Lich. Antarct. in Hook. Jour. Bot.) have enlarged the present 

 genus by the addition of some interesting tropical and other species. 



1. S. crocea, Ach. Thallus coriaceous, lobed, obscurely green be- 

 coming cinnamon-colored ; on the under side saffron-colored, with rather 

 obscure, branched, anastomosing veins; apothecia applanate, immargi- 

 nate, dark-chestnut. Ach. Syn. p. 8. Peltigera, Fr. Lichenogr. p. 48. 



On the earth, Arctic America. Greenland, Dill. North of Point 

 Lake, Rich. (Herb. Hook. !). V;, /,• zi- 



2. S. saccala, Ach. Th. membranaceous, subimbricate, from green 

 becomiDg greenish-cinerascent ; on the under side whitish and fibrillose ; 

 apoth. applanate, finally saccate-depressed, blackish-fuscous. Ach. Syn. 

 p. 8. Peltigera, Fr. Lichenogr. p. 49. 



Rocks (limestone). New York, B. D. Greene, Esq. Newfoundland, 

 Pylaie. Northward to Bear Lake, Herl. Hook. ! Solorina orbiculata, 

 Menz. herb. I from the Pacific coast, appeared to me a distinct, but I 

 believe it is an undescribed species. 



Vm. STICTA, Ach. 



Apothecia scutelliform, adnate to the margin or disk of the thallus, 

 somewhat oblique, the margin free beneath. Disk at first closed, nu- 

 cleiform ; becoming at length elevated and explanate. Thallus expand- 

 ed from a centre, foliaceous, coriaceous-cartilagineous, lobate, villous 

 on the under side, and having on this side small, regular urceolate cav- 

 ities {cyphella), or where these are wanting soredia, or discolored 

 spots. 



A mostly tropical genus, with many West Indian and South Ameri- 

 can species, some of which are represented in the extreme southern 

 parts of the United States. 



1. S. mirata, Ach. Thallus subcoriaceous, reddish-brick-colored ; 

 on the under side lanuginous, reddish-yellow at the circumference, and 

 besprinkled with small, irregular, often sorediiform, yellow cyphellae ;~ 

 laciniae rounded, sinuate-cut, the margins undulate, crisped, and yellow- 

 pulverulent ; ' apothecia marginal, disk plane, fuscous-red, margin in- 

 flexed.' Delis. Stict. p. 49. .'~' 



Among mosses on rocks and trees. (Southern States ! and Texas ! 

 infertile.) Ohio .' The Southern Lichen probably occurs within our 

 limits. 



