On the Lichens near New-York. 17 



21. Nephroma. 

 1. resupinata. Id. p. 241. Earth among moss. Frond 

 brownish; distinguished by the apothecia being seated 

 on the under side of the frond, the lobes of which turn 

 over. 

 * var. fi.papyracea. Ibid. Frond greenish. 



22. EvERNIA. 



1. prunastri. Id. p. 245. Branches of trees. Rare. Frond 



granulated glaucous above, underneath whitish, reticu- 

 lated. 



2. vulpina? Id. p. 245. Massachusetts. Frond yellowish 



green, branching, segments attenuated, lacunose, com- 

 pressed. In appearance like Cenomyce uncialis, but 

 easily distinguished by its central cotton-like medulla. 

 Perhaps a new species. 



Order III. CEPHALOIDEI. Apothecia subglobose, termi- 

 nating the frond. 



23. Cenomyce. 



§ Frond foliaceous, podetia fistulous, attenuated, or dilated 



above. 



* Apothecia pale. 



1. ccespiticia. Id. p. 249. On earth. Frond minutely cleft; 



podetia very short, marginal. 



2. alcicornis. Id. p. 250. On earth, in dry rocky situations. 



Frond with pale greenish, palmated, ascending seg- 

 ments, lighter underneath ; podetia hardly perceptible. 



3. endivicefolia. Id. p. 250. Ibid. Frond large, leafy, yel- 



lowish green, white beneath, segments multifid ; pode- 

 tia also very minute. 



4. verticillata. Id. p. 251. On earth among moss. Podetia 



cylindric, glabrous, livid greenish, the margin dilating 

 horizontally, proliferous frOm the centre. 



5. pyxidata. Id. p. 252. Ibid. Podetia turbinate. 



C 



