| Lichenes of New. England. 
bridge. Also in the lower regions of the White 
" Mountains. 
= L, geographica, Hook. l: c., Rhizocarpon geo 
graphicum, De Cand. 1. c., Lecidea atro-virens, var. 
geographica, Ach. Meth., Liehers geographicus, L., 
Ach. Prodr. — Alpine locis White Mountains, and - 
Chin of Mansfield, Vt. An elegant species. - 
L. pruinosa, Ach. Meth., Hook. 1. c., L: albo- 
cerulescens, Ach. Syn., Muhl. l. ¢., Mass. Catal., 
Lichen pruinosus, Dicks. (cit. Hook. ): — On. rocks 
and boulders, not confined to limestone. Plainfield, 
Port.!, Waltham; Lexington, Medford, Manchester, 
and Wes in this vicinity, not uncommon. In 
the synonymy of this species, I have followed 
Hooker, l.c., but itis proper to refer to De Cand. 
Fl. Fr., whargiibme additional facts may be found. 
-L. albo-atra, Borr: in Hook. 1. cC; L. corticola, 
Ach. Syn. (cit. Hook. ), Muhl: 1. ¢., Hals. 1. c., Lich- 
en corticola, E. Bot., Verrucaria abeatis Hoffn. 
(eit. Hook.). — Old un West Cambridge. 
L. anomala, Ach. Syn., Hook. l. c., Patel 
anomala; Spreng. 1. c., Lecanora.anomala, Ach. Lich- 
enogr., Parmelia itm Ach. Meth, Suppl. — Bark 
of Juniperus Virginiana, Cambridge.  Apothecia. re- 
markable for a waxy lustre, especially apparent when 
the plant is wet. I have some hesitation in regard to 
our plant, which belongs to a rather doubtful group. 
The Lecanora effusa of Muhlenberg’s . Catalogue 
probably belongs to it, as Hooker unites this species 
with Lecidea anomala. With this exception, I be- 
lieve the species has not been ‘mentioned by Amer- 
ican authors. 
