LECANORA. ] LECANO-LECIDEEI. 473 
Lawers, Perthshire ; near Portlethen, Kincardineshire ; Morrone, Braemar, 
Aberdeenshire. Kileully, near Cork; Kilkee, co. Clare; Doughruagh 
and Maam mts., Connemara, co. Galway; Black mt., co. Antrim. 
Form obscurata Nyl. Flora, 1872, p. 364.—Thallus dark- or 
olive-greyish. Apothecia and spermogones as in the type.—Leight. 
Lich, Fl. ed. 3, p. 195.—Parmelia cinerea var. obscurata Fr, fil. 
Lich. Suec. n. 343.— Brit. Hxs.: Leight. n. 175; Mudd, n. 185. 
Variously placed by authors, but evidently referable to this species, 
with which, except in the darker thallus, it entirely agrees. In this 
respect, however, transition states at times occur. 
Hab, On rocks and boulders in upland and subalpine tracts.—Distr. 
Found only in a few localities in Great Britain and S.W. Ireland.— 
B.M.: Malvern Hills, Worcestershire; Caer Caradoc, Shropshire; Cliff- 
rigg, Cleveland, Yorkshire; Reston Scar, Staveley, Westmoreland. 
King’s Park, Stirling; Craig Tulloch, Blair Athole, Perthshire; Mor- 
rone, Braemar, Aberdeenshire. Killarney, co. Kerry. 
171. L. levata Nyl. Flora, 1872, p. 364, 1881, p. 183.—Thallus 
determinate or effuse, very thin or thin, continuous or here and 
there rimulose, smooth, somewhat shining, sordid-lurid-glaucous 
(K—, CaCl—); hypothallus black, often indistinct. Apothecia 
minute, concave, black, the thalline margin somewhat tumid, 
prominent, entire or subcrenulate; spores 0,015-24 mm. long, 
0,009-14 mm. thick; hymenial gelatine pale-bluish, then tawny 
wine-coloured with iodine.—Sagedia levata Ach. Lich. Univ. (1810) 
t. 6.f. 5. 
Generally regarded as only a variety of ZL. gidbosa, but distinct in the 
much thinner, more continuous thallus and the minute apothecia. More 
definitely, however, it is separated from it, and from all the allied species, 
by the form of the spermatia. ‘These are slightly arcuate, 0,020-32 mm. 
long, 0,0005 mm. thick ( fide Nyl. Lich. Fret. Behring, p. 31). In the 
single British specimen the thallus is indeterminate, but Acharius (Syn. 
p. 184) says it is now and then limited by a black serpentine (hypo- 
thalline) line. Both apothecia and spermogones are numerous, the 
former being here and there somewhat crowded. 
Hab. On a damp quartzose riparian rock in a subalpine district.— 
Disty. Extremely local and scarce among the N. Grampians, Scotland. — 
B. M.: Glen Callater, Braemar, Aberdeenshire. 
172. L. calcarea Somm. Suppl. Fl. Lapp. (1826) p. 102; Nyl. 
Flora, 1869, p. 409.—Thallus determinate or subeffuse, tartareo- 
farinose, continuous or rimoso-areolate, white-cretaceous or greyish- 
white (K—, CaCl—, medulla I—); hypothallus white. Apothecia 
immersed, at length somewhat plane, submoderate, cesio-pruinose ; 
the thalline margin entire or rugoso-plicate; spores 2—6nz, rarely 
8nz, ellipsoid or often subglobose, 0,018-30 mm, long, 0,014— 
27 mm. thick; paraphyses not discrete, dark at the apices; hyme- 
nial gelatine bluish, then sordid-yellow with iodine—Cromb. Lich. 
Brit. p. 54; Leight, Lich. Fl. 209, ed. 3, p. 192.—Aspicilia cal- 
