104 NEPHROMA. 



ica, Richardson (Frankl. Narr., & Leight. in Journ. Linn. Soc.), 

 1823. New England, etc., Tuckerman. Canada, Macoun. Ore- 

 gon, Hall. British Columbia, Macoun. Occurs naked and 



smooth above, and scarcely tomentose beneath. 



4. N. Helveticum, Ach. ; thallus membranaceous, smaller and 

 more narrowly and deeply sinuate-laciniate than the last; smooth 

 and for the most part naked above ; and from grey soon tawny- 

 brown ; the rounded, undulate-crenate lobes fringed with tooth- 

 like lobules ; beneath blackening and tomentose ; apothecia 

 smallish to middling-sized ; from reddish-brown soon blacken- 

 ing. Spores ellipsoid and sub-fusiform, brown, ^J mic. Ach. 



L. U.p. 523. Tuckerm. Syn. N. E. p. 18, & Lick. exs. n. 14. 



On trees and rocks. Arctic America, Eicliardson (Frankl. 

 Narr., & Leight. in Journ. Linn. Soc.), 1823. New England, etc., 

 Tuckerman. Westward to Oregon, Hall, and California, Bo- 

 lander. Southward common, and the characteristic species, 

 from the Carol inas, Ravenel, to Alabama, Peters, and Louisiana, 

 Hale. Also in Mexico, Nylander. The lichen is well -distin- 

 guished here, and scarcely to be united with either of the other 

 species. There is however a rock-form passing generally above 

 into minute lobules (N. asperum, Mihi, olim) in which the under 

 side is only obsoletely or scarcely tomentose, and which in other 

 respects is not unlike N. Icevigatum; itself likewise now obso- 

 letely tomentose, as in Anz. Langob. n. 252. 



5. N. Isevigatum, Ach. ; thallus coriaceous-membrauaceous, 

 rosulate, with smallish, rounded, undulate lobes, which are very 

 smooth but at length wrinkled and pitted above ; and from glau- 

 cescent becoming more or less chestnut-brown ; beneath mostly 

 pale, wrinkled, naked; apothecia smallish to middling-sized; 

 disk reddish-brown. Spores fusiform-ellipsoid, and daetyloid, 



pale brown, mic. Ach. Syn. p. 242. Nyl. Syn. 1, p. 320. 



Peltigera bella, Spreng. Syst. 



b. parile, Nyl. ; thinner and softer, at length darker ; beneath 

 blackening; the lobes besprinkled, especially at the margins, 



-with grey soredia. Nyl. I. c. Nephroma, Ach. Tackerm. 



Syn. N. E. p. 18. 



On mossy rocks, and also on trunks, in mountain forests. 

 New England and northern States (Torrey], Sprengel Syst. 

 Veg. (Peltig. Mia, Spreng. !), 1827. Greenland, Vahl. e Th. Fr. 



