264 PROCEEDINGS OF THE AMERICAN ACADEMY 



is perhaps referable to this species, which has escaped notice, but prob- 

 ably occurs within our limits. 



8. U. liirsula, Ach. (sub Gyroph.). Th. coriaceous, softish, pulver- 

 ulent, cinerascent and white ; on the under side from pale-fuscous be- 

 coming blackish, very hirsute with large, softish, at first pale, branched 

 fibres (at length subfibrillose-scabrous and black) ; apoth. marginal, ap- 

 pressed, becoming patellfeform, and at length convex, and subglobose, 

 gyrose-plicate, with a thin margin. Gyrophora hirsuta, Ach. ! Syn. p. 

 69. U. vellea, y. hirsuta, Fr. Lichenogr. p. 358. — (3. depressa ; th. at 

 length rigid ; apoth. somewhat impressed, plane, with a thick margin. 

 U. veMea, §. depressa, Fr. I. c. U. depressa, j3. spadochroa, Schczr. ! 

 Tuckerm. Lich. N. E. I. c. {sul Gyroph. spadochroa). 



Rocks. Common in mountainous, and ascending to alpine districts. 

 New England, fertile. Northward to Arctic America, R. Br. The 

 New England Lichen does not appear to differ from those of Sweden 

 and Switzerland, unless, perhaps, in attaining to a larger size, and, like 

 the foreign ones, is near the U. vellea of Sweden, which differs in its 

 tumid-marginate, papillate apothecia. Of the last species I have not 

 seen American specimens, unless, with Schferer, and in accordance 

 also with the earlier view of Fries, we consider the present species as 

 a variety of it. 



9. U. DiUenii, Tuckerm. Th. coriaceous, rather rigid, smooth, from 

 glaucous-fuscescent becoming dark-fuscous ; on the under side black, 

 and closely hirsute with short, black, crowded fibres (or lacerate, and 

 papillose-scabrous) ; apoth. convex, at first orbiculate and concentri- 

 cally plicate, becoming at length lirellate, with a thin (canaliculate) 

 margin. Lichenoides coriaceum latissimo folio, Sfc, Bill. Muse. p. 

 545, 8f t. 82, /. 5. U. vellea, Michx. ! Fl. 2, p. 323, ^ Auct. Amer. 



Rocks. Paiqualian Mountain, New Jersey, J. Bartram (Dill.). 

 Canada, Michaux ! Newfoundland, Herh. Montagne ! Pennsylvania ! 

 Muhl. New York, Torrey. Very common in New England, and fer- 

 tile. The apothecia are often abortive (very small, and forming some- 

 times a continuous black crust) ; but in a single specimen from the 

 White Mountains they are perfect, and agree with the minute descrip- 

 tion in Michaux, whose Lichen was certainly the same with that of 

 Dillenius. The species is widely diffused in North America, and pre- 

 serves its peculiar features from Newfoundland to the Alleghanies of 

 Pennsylvania; contrasting in this respect with the more limited and 



