On the Lichens near New- York. 1 9 



var. y. alpestris. Podetia very branching, branches 

 implex, terminal ones forming a thick panicle or 

 thyrse. 



24. BffiOMYCES. 



1. roseus. Id. p. 280. On argillaceous earth. Pedieles 



white; apothecia pale rose. 



2. rufus. Id. p 280. On rocks. Crust rough, ashy green- 



ish ; apothecia chesnut, pedicles short. 

 25. Isidium. 



1. corallinum. Id. p. 281. On rocks. Crust white, verru- 



cose ; apothecia only visible to the microscope. 



2. phymatodes. Id. p. 282. Rotten wood in moist places. 



Crust green. 



26. Stereocaulon.. 

 paschale. Id. p. 284. Frond grayish, branching, and rough 

 with granular excrescences; apothecia terminal 

 blackish. 



(a) 



HI. Class. HOMOTHALAMI. 



Order I. SCUTELLATI. Apothecia scutelliform, subsessile, 



bordered. 



27. Alectoma. 



1. jubata. Id. p. 291. Pendent on branches chiefly of Coni- 

 ferce. Frond black, capillary. 



28. Ramalina. 



1. polymorpha. Id. p. 295. Trunks and rocks. Frond 



compressed, terete, with terminal soredia; apothecia 

 submarginal. 



2. fraxinea. Id. p. 296. Ibid. Frond broad, attenuated 



above ; apothecia marginal, pale flesh colour. 



(a) The genus Rhizomorpha has, by the best cryptogamists of the. 

 present day, been removed to the Fungi. 



