1896. ] North American Species of Parmelia. 203 
lander! described ten North American species, and has dis- 
covered some new ones among specimens sent him from New 
Bedford; and some additional species have turned up since 
Tuckerman wrote. So that at present there appear to be 
known about forty species. The reactions of most of the 
species are given in Hue’s Lichenes Exotict. 
_1. P. PERLATA (L.) Ach.—Th. K yellow Me. K—. But 
inthe var. olivetorum Ach. (the proper designation of which 
seems to be o/tvaria Ach.) Me. K dull red. The lichen is a 
widely extended one. Very near to it is P. cetrarioides (Del.) 
yl., which occurs on rocks in New Bedford, agreeing with a 
specimen from Switzerland (Lojka.). Another New Bedford 
specimen, with the habit and reaction of perlata, has the lobes 
ciliate, and may be the var. cé/éata DC. But Nylander? con- 
sidered it hardly to differ from P. crinita. A sorediate form 
(var. sorediata Scher.) also occurs in New Bedford. 
_ 2. P. CRINITA Ach.—The New Bedford plant referred here 
in Willey’s Lichens of New Bedford is referred by Nylander 
OP. perforata, But I have since found an isidiose specimen, 
otherwise resembling P. perlata, which may be the plant of 
Acharius and of Tuckerman’s Synopsis which is so described. 
The reactions of P. crinita are variously described by authors 
&8 Me., “saftgriin” (Krempelhuber), ‘‘atro-virens fere atra 
(ibid). The Pp. crinita Nyl. Syn. seems to be a different 
Plant, and is referred by Wainio (Brazil) partly to P. probos- 
‘dea Tayl, and partly to P. melanothrix(Mont.). P. crimita is 
uetitioned in several lists of North American lichens, but on 
What authority I know not. : : 
RATA Ach.—This, like the preceding, 1s a sco 
the Tuckerman seems to have regarded all oer 
- a of perforata with narrowed or finally evernioid lobes 
Dp onging here. But I think this can hardly be the case. 
. dag = ~ cetrata from Australia eae ) ioperene 
; rkable variety is var. kypotropotdes Nyl. in litt., 
“ve branches of ie cedar ave ucdhae with the thallus 
iene white, as in P. hypotropa, and becoming eae 
Wainio (Brazil) gives the reaction of cetrata Th. - 
e.K yellow, then red, with which the New Bedfor 
= Pereee: A large New Bedford plant called F. ogevatd 
1 
apt 5905 ef seg. 188c, 
—! 603. 1885. 
* £. CET 
cult lichen, 
