1896.] North American Species of Parmelia. 205 
lacinia, beneath black and naked, but yellowish-white at the 
margin. Me. K red, but not showing any reaction beneath. 
Apothecia large, perforate. Spores .009-.16 x .006-.009™". — 
On trees, New Bedford, and District of Columbia (Lehnert). 
10. P. PRASIGNIS Nyl. Pyr. Or. 17; Flora —: 610, 1895. 
On trees, Arizona, Pringle, 1881. Me. CaCl red. Spores 
‘014—.016 x .007—.009™"; spermatia bifusiform, .006— 
007™ long. Also in Mexico. 
Il, P. TILIACEA Ach.—The reaction given is Me. CaCl 
ted, asin Lojka Exsic. Univ. #. 62. But only one of num- 
frous specimens gives any reaction, which would be P. 
sublevi gata Nyl. Me. K yellow, then red.—P. /vida Tayl. 
irom New Orleans is considered by Nylander as a variety of 
this; but Miiller in Beitr. z. 7344 looks upon it as distinct. 
P. galbina Ach. Syn. 19, from North America is a small form 
on dead wood. P. relicina Fr., which is made a variety of this 
by Tuckerman, is considered by most authors to be distinct. 
It. P. BORRERI, var. RUDECTA Tuck. is separated by Nyl- 
ander on account of the spermatia which in Borreri are sub- 
geniform and in rudecta acicular-cylindrical and twice as 
ong, 
12, P. KAMTSCHADALIS (Ach.) Eschw. Me. K red.—‘‘Bor- 
7a glabrata Schwein.” then ‘‘Evernia polita Tuck.” in herb. 
chwein, (comm. Eckfeldt without station) seems to be a 
broad-lobed form of this. 
But: CONSPERSA (Ehrh.) Ach,—Me. K yellow then red. 
ut isidiose specimens on rocks, New Bedford, give Me. K—. 
; 's also the case with a similar specimen in Stenh’s Exs. 
Nec. n. 122, while the others give K red. 
T '4. P. MOLLIUscULA Ach.—Me. K yellow, then red. Mr. 
aha Williams has described and figured in Report of Mis- 
oe taney Garden, May 1892, a fertile specimen collected in 
colle eK Hills by Dr. Engelmann in 1856. _A fertile plant, 
med by. T. S. Brandegee in Colorado, closely resembles 
: Williams's figure and description. Apothecia numerous, 
or. &'" incurved, crenate, the disk blackening. Spores 
lone 13 X -005~.006™", Spermatia cylindrical, .007-.009 
i Me. K red, : 
oe 2 CONGRUENS Ach.—This species, which is sl a8 
tale Lichenes Americani, pl. 4, was not pete id 
i wee man as North American. But according to Nylan 
Urs in Mexico, and Miiller, who had seen Muhlenberg s 
