PARMELIA. | PARMELIEL. 249: 
shire; Llaneltyd, near Dolgelly, Merionethshire; Coe Coch, Snowdon, 
Carnarvonshire; near Kendal, Westmoreland. Inverary and Appin, 
Argyleshire; Ben Lawers, Perthshire. Dunkerron, co. Kerry. 
18. P. Mougeotii Scher. Enum. (1850) p. 46.—Thallus small, 
orbicular, appressed and closely adnate, shining, greenish or greyish- 
yellow, usually with yellowish-white tuberculose soredia; beneath 
rugose, brownish-black ; rhizing: not visible ; lacinis narrow, lineari- 
multifid, slightly convex, sub-diffract in the centre, explanate at the 
apices, transversely rimose (K{ yellowish, CaCl). Apothecia 
minute, reddish-brown, the margin sulphureo-pulverulent ; spores 
0,008-10 mm. long, 0,005-6 mm. thick Mudd, Man. p. 102; 
Cromb. Lich. Brit. p. 834.—Parmelia conspersa f. Mougeotii Leight. 
Lich. FI. p. 136, ed. 3, p. 125. Lichen incurvus Eng. Bot. t. 1375 
(et descr. pro parte).—Brit. Hxs.: Leight. n. 143; Mudd, n. 74; 
Cromb. n. 143; Larb. Lich. Herb. nos. 87, 251. 
Closely allied to P. conspersa, but distinguished by the frequent presence 
of scattered soredia and by being much smaller in all its parts, though the 
individual plants sometimes become confluent. The thallus is frequently 
greyish or dark in the subcrustaceous centre, and the lacinix are occa- 
sionally more discrete at the circumference, The apothecia, which are 
rare in this country, as elsewhere, are few and scattered. The spermo- 
gones, which are not frequent, are very minute, brownish-black, with 
straight, short, subcylindrical spermatia, 0,005-6 mm. long, about 
0,001 mm. thick. 
Hab. On rocks and boulders, chiefly granite and gneiss, in maritime 
and upland districts.—-Distr. Local and scarce in Great Britain and Ire- 
land; most frequent, perhaps, on the Grampians, Scotland.—B. M.: 
Thetford Warren, Norfolk ; Withiel and Penzance, Cornwall; Charnwood 
Forest, Leicestershire ; near Barmouth and Capel Arthog, Merioneth- 
shire; Ingleby, Cleveland, Yorkshire ; Teesdale, Durham; Near Kendal, 
Westmoreland. New Galloway, Kirkcudbrightshire; Achosragan Hill, 
Appin, Argyleshire ; Ben Lawers and Craig Tulloch, Perthshire ; Durris, 
Kincardineshire ; Crathes, Aberdeenshire (frt.) ; and Glen Dee, Braemar. 
Curraghmore, co. Waterford; Dunkerron, co. Kerry; Connemara, co. 
Galway. 
Form dispersa Cromb. Grevillea, xv. (1887) p. 75.—Thallus 
indeterminate, diffract; the laciniz very narrow, short, discrete, and 
more or less scattered. Apothecia not seen. ; 
This form no doubt is due to the normal evolution of the thallus being 
arrested, so that it grows in an interrupted manner. It is but sparingly 
sorediate, and is always sterile. 
Hab. On schist rocks in shady situations in subalpine traets.— Distr. 
Local and scarce in the W. Highlands, Scotland.—B. M.: Achosragan 
Hill, Appin, Argyleshire. 
19. P. incurva Fr. Noy. Sched. Crit. (1826) p. 82.—Thallus 
orbicular or expanded, appressed, stellato-laciniose, subopaque, 
greenish straw-colourcd or oehroleucous, with somewhat large, 
