440 Lichenes of New England. 
Parmelia, and the form called Lecidea incana, the 
young state. No authors, that I have seen, appear to 
suggest any affinity between Parmelia lanuginosa 
and Lecidea incana, and I therefore leave this ques- 
tion for further consideration. 
L. Oedéri, Ach. Meth. p. 49., Hook. 1. c., Mass. 
Catal, (with a qu.) — Rocks; White Mountains; 
frequent. The synonymy of this plant indicates 
considerable difference of opinion among authors. 
Sprengel considers it a variety of L. atro-alba, colored 
by the iron of the rocks on which it grows. This 
_ view, as to the color, was taken in the former of 
these papers, where the plant was referred to Urceo- 
laria. According to Hooker, Scherer, in one of his 
works, pronounced the species *a true Urceolaria.” 
Scherer quotes * Ach. MSS. 1818,” for the name ~ 
Gyalecta Oederiana. It is made a variety of his 
Patellaria confluens by Wallroth. I still think itbe — 
longs to the Acharian genus Urceolaria: but it ap- - 
pears to be the Lecidea Oederi of our authorities. . 
There are many species which, in the language of 
Turner and Borrer, “ place difficulties apparently in- 
superable, in the way of a — E 
of the Lichens.” 
L. iemadóphila, Ach. Meth. p. 58.,  Lichenogr. p. 
191, Scher.! 1. c., Moug. & Nestl.! 1c., Hook 
Br. FL, Muhl. Catal., Torr. Catal., Patellaria jemado- 
phila, Wallr. 1. e. , P. eruginosa, Spreng. 1. c., Lichen 
 lemadophila, Ehrh. (cit. auctt.) L. seruginosus, Scop. 
Carniol., Ach. Prodr. — Decayed trunks; mountains 
of New England, very frequent. Much resembling 
Bæomyces roseus, with which it was confounded by 
