PARMELIA | PARMELIACE® 129 
The spermogones are rather rare, minute and brownish-black; the 
spermatia are 5-6 » long and 1 p thick. 
Hab. On rocks and boulders, chiefly granite and gneiss in mari- 
time and upland districts.—Distr. Local and rather scarce, in Great 
Britain and Ireland; most frequent perhaps on the Grampians, 
Scotland.—B. M. Withiel and Bodmin, Cornwall; Charnwood Forest, 
Leicestershire ; near Barmouth and Capel Arthog, Merioneth ; Bettws- 
y-Coed, Carnarvonshire ; Battersby and Ingleby, Cleveland, Yorkshire ; 
Teesdale, Durham; near Kendal, Westmoreland; New Galloway, 
Kirkeudbrightshire; Achosragan Hill, Appin, Argyll; Ben Lawers 
and Craig Tulloch, Perthshire; Durris, Kincardineshire; Glen Dee, 
Braemar and Crathes, Aberdeenshire; Curraghmore, Waterford ; 
Dunkerron, Kerry; Connemara, Galway. 
Form dispersa Cromb. in Grevillea xv. p. 75 (1887).— 
Thallus of scattered narrow short lacinie, sparingly sorediate. 
Apothecia not seen. 
Hab. On schist rocks in shady situations in subalpine tracts.— 
B. M. Achosragan Hill, Appin, Argyll. 
13. P. olivetorum Nyl. in Not. Sallsk. Faun. & FI. Fenn. 
Forh. v. p. 180 (1866).—Thallus horizontal, roundly lobed, 
smooth, greyish-green becoming yellowish-brown and_ shining 
when dry, the lobes somewhat ascending, crisp, incurved, 
thickened and sorediate at the margins, beneath blackish, 
brownish at the circumference, wrinkled, very sparingly rhizinose 
(K +3, CaCl F **). Apothecia moderate in size (5-10 mm. 
across), shortly pedicellate, brownish-red, the excipulum and 
margin smooth, becoming sometimes sorediose ; spores 14-18 p, 
long, 7-12 » thick. Leight. Lich. Fl. p. 130; ed. 3, p. 121. 
P. perlata var. olivetorum Ach. Lich. Univ. p. 458 (1810). 
Distinguished from P. perlata by the almost complete absence of 
rhizine and by the thin lines of marginal soredia. The British speci- 
mens are sterile. The spermatia are cylindrical. 
Hab. On trunks of trees and on rocks in wooded maritime and 
mountainous districts.—Distr. Rare in 8. England, N. Wales and 
S.W. Highlands of Scotland.—B. M. Drews-y-nant, Merioneth ; 
Barcaldine, Argyll. 
14. P. cetrarioides Del. ex Nyl. in Flora lii. p. 290 (1869). 
—Thallus large, orbicular or irregular, roundly lobed, smooth, 
generally wrinkled, the lobes broad, crenate, somewhat ascending, 
crisp and sorediate at the margins, beneath blackish, brownish 
at the circumference, wrinkled, very sparingly rhizinose 
(K + sew, CaCl —, medulla K (CaCl. f. + reddish). Apothecia 
moderate or large, brownish-red, the margin entire, becoming 
sorediose ; spores 14-16 pw long, 11-12 p» thick.—Cromb. Lich. 
Brit. p. 34; Leight. Lich. Fl. p. 128; ed. 3, p. 119. P. perlata 
var. cetrarioides Duby Bot. Gall. ii. p. 601 (1830). 
I. K 
