Lichenes of New England: 289 - 
P. ulothriz, Achy Meth., Muhl. l. c., Hals. 1. e., * 
Mass. Catal, Imbricaria ulothrix, De Cand. 1. c., 
Moug. & Nestl.!, Lichen ulothrix, Ach. Prodr., L. 
ciliatus, Hoffm. (cit. Ach.). — Bark of trees, Cam- 
bridge, Watertown, Medford, &c.  *Ciliis scutella- 
rum (sepe deficientibus et facile elabentibus) impri- 
mis a Parmelia cycloselide differt, cui alias simil- 
lima.” (Ach. Meth.) : There is, however, in the 
descriptions, another character to separate these spe- 
cies, — the mealy. warts on the margins of the lobes 
and elsewhere on the upper surface of P. cycloselis. 
These are very apparent in our New England form 
of this species, but I have observed the same on P. 
ulothrix. The latter is distinguished bya prn 
able character, but it may possibly hereaft er be ‘Te 
duced toa,variety of P. DE In this case, the 
question might be entertained, whether Hoffmann's 
name, above-cited, has not the rigt of * priority. 
— P. Fahlunensis, Ach. Meth., Moug. & Nestl.! 1. ; 
c., Spreng. 1. c., Hook. 1. c., Imbridittis Fahlunensis, 
De Cand. l..c., f A Fahlunériis, Hoffm. (cit. 
Cand.), sete Fahlunensis, L. 7 Ach. Prodr. — La 
major, Scher.! l. c., rocks, Notch of the White 
Mountains. — p. minor, Scher. ! l. e., rocks, with the 
last. Somewhat resembling P. stygia, especially 
the form g. P. Fahlunensis is a larger and wider- 
lobed lichen, the extremities of the lobes not de- 
curved as in P. stygia, the apothecia larger, and it - 
occurs at a much less elevation. . Linnæus first de- - 
tected our Plans about the mines of Fahlun, in 
Sweden. - 
P. dese, Ach. -Meth., Bobo ! lc. Moug. & 
VOL. I. — NO. Hi. 3T 
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