Lichenes of New England. 447 
Also Plainfield, Dr. Porter!. Chelmsford, Mr. Rus- 
sell. A more delicate form, resembling the var. 
tenuis, Ach., Scheer. !, is common on fences. 
R. fastigiáta, dui Lichenogr. p. 603., Moug. & 
Nestl. ! 1. c., Hook. 1. c. ; Muhl. |. c., "Torr... c., Hals. 
l. c., Mass. Catal., Partndlis Fomin a. faatig ii 
Wallr. 1.6; Piryéoia fastigiata, De Cand. 1. c., Par- 
melia fastigiata, Ach. Meth. p. 260., Spreng. l. c., 
Lichen fastigiatus, Pers. Ach. Prodr. — Trees and 
fences; very common. Generally distinguishable by 
its deligito habit, and large sub-terminal apothecia. 
R. frazinea, Ach. Lichenogr. p- 602., Scher. ! 1. c., 
Hook. !1. c., Muhl. 1. ciy Torr. 1. c., Hals. l. c., Mass. 
Catal., Physcia. fraxinea, De Cand. 1. $5. Mich. EL 
Bor. ind Moug. & Nestl. ! l. c., Parmelia fraxinea, 
Ach. Meth. p. 258, Spreng. 1. c., "Wallr. l. c., Lichen 
fraxineus, L. , Walt. F1. Carol., Fis eei Trees; 
common. A more rugose habit of thallus, and differ- 
ently situated apothecia distinguish this species from 
the preceding. 
R. farinàcea, Ach. Lichenogr. p. 606., Scheer. ! 
l. c., Moug. & Nestl. ! 1. c., Hook. 1. c., Pailin ca- 
lyca 8. chraumatica, Wallr. le. x hyacla farinacea, 
De Cand. 1. c., Parmelia farinacea, Ach. Meth. p. 263, 
Spreng. l. c., Lichen farinaceus, L., Ach. Prodr. — 
Rocks and trees; White Mountains ; very Eos 
in the Notch, Our plant agrees ith the cited speci- 
men from Hooker in Mr. Greene’s herbarium, and 
also with the other foreign specimens. It is very 
distinguishable, by its delicate habit, and numerous 
soredia. 
