
OF FILAMENTOUS, FRUTICULOSE, AND FOLIACEOUS LICHENS. 223 
‘most assuredly be frequently doomed to disappointment. In specimens on bark 
from Ardrum, near Cork, also collected by Carrou, the spermatia are delicate 
needles about gsth long, and nth broad; the sterigmata, with spermatia attached, 
measure ~:th to zath long, and smth to iomth broad. The elongated, ramose, 
sterile filaments reach a length of jth to soth, with a breadth of ynth to sath. 
The envelope is of a pale-brown cellular tissue. 
Specimen 15.—ScH#RER exs. 367 (sub 0. vittata); on firs. There area few old 
spermogones on the lower specimen in my copy (ed. alt. immut. 1840), scattered 
on the convexities of the laciniz near their ends. The ostioles are large, round 
or oval, with a turgid, black, ring-like border. 
Specimen 16.—Van Dieman’s Land; coll. Cuas.Stuart. The thallus is broad- 
lobed, very white; the apothecia are seated on bullose erect pedicles, or podetia- 
like dilatations of the lobes, which resemble those of Leptogiwm bullatum. The 
| spermogones are very abundant, large, and easily seen. Mauritius; both speci- 
| mens being in Herb. Hooker, Kew. 
Specimen 17.—On trees and rocks, forests round Mount Wellington, Van Die- 
man’s Land; coll. Mossman, 1840; in Herb. Royal Botanic Garden, Edinburgh. 
| The lacinize are large, white, and glossy ; the apothecia and spermogones plentiful, 
and of the ordinary characters. 
Specimen 18.—Var. vittata, Scher.; West Coast of North America; coll. A. 
Menziss, 1787; in Herb. Menzies, Royal Botanic Garden, Edinburgh. The laciniz 
are very long, flaccid, narrow, and everniiform. There are no apothecia; and the 
spermogones are few but large. In a specimen from the same locality, also col- 
lected by Menzizs, in Herb. Hooker, Kew, the lacinize are pendent, and some- 
times bullose at their extremities; the spermatia and sterigmata of the spermo- 
gones are quite those of our British P. physodes. 
Specimen 19.—Norway ; in Herb. Hooker, Kew; very near ScumreEr’s vittata. 
Some of the laciniz are wholly dotted over with old spermogones, in few or none 
of which are spermatia discoverable. 
Specimen 20.—Var. lugubris, Pers., Avon Ranges, Australia; coll. MuLuzr, 
1854; in Herb. Hooker, Kew; with apothecia. The plant greatly resembles P. 
encausta, the whole surface of the lacinize being black-punctate with immersed 
spermogones, as in that species. 
Specimen 21.—Var. enteromorpha, Ach. (sub Parmelia enteromorpha, Ach.) ; 
Tasmania, Antarctic Expedition 1839-43, Dr Hooxer. This is a form trailing 
over shrubs of various kinds, just as it does on heather, &c., in this country. In 
some specimens apothecia abound, and the same specimens are generally more or 
less plentifully dotted over with spermogones. ‘They are in all respects those 
| of the type to which this plant manifestly belongs as a variety. They are 
_ usually grouped in large numbers; the ostiole is flat or depressed, never papillate. 
| The spermatia are acicular, about anth long. Associated with the sperma- 
