BRITISH LICHENS

58 CYCLOCARPINE;E LECIDEA
Differs from L. latypea in the reaction with CaCI, in the much
thinner, more furfuraceous thallus, and in the usually almost colourless
hypothecium. Acharius' species L. enteroleuca (Lieh. Univ. 177 (1810»
grows on trees and is included under L. parasema var. elceochroma.
Nylander has drawn a distinction between L. goniophila and L. entero·
[euca in that the spermatia of the former are straight, while those of
L. enteroleuca are arcuate 20-30 [J. X 1 [J.. (See Lich. Env. Paris, 90
(1896».
Hab. On rocks mostly siliceous and on stones.-Distr. Frequent in
all parts of the British Isles.-B. M. St. Lawrence, Isle of Wight;
Ardingly Rocks, St. Leonard's Forest, Sussex; illtihg, Essex; Llmpley
Stoke, Wilts; Cirencester, Gloucestershire; Llandyssll, Cardigans hire ;
Knighton, Radnorshire; near Oswestry and Tong Priory, Shropshire;
Barmouth and Dolgelly, Merioneth; Capel Curig, Carnarvonshire;
Shawswell, Gloucestershire; Ayton, Cleveland Dent, and near Battersby,
Yorkshire; Mallerstrang, Staveley and ncar Plumgarths, Westmor.
land; Barnard Castle, Teesdale, Durham; near Berwick; Lamplugh,
Cockermouth, Cumberland; Glen Tilt, Craig Calhach and Cralg Tulloch,
Blair Athole, Perthshire; Barcaldine, Argyll; neat Kylemore, Conne.
mara and Lough Cooter, Galway; Clare Island, Mayo.
Var. acervata Mudd Man. 202 (1861).-Thallus effuse,
greyish-white, granular, the granules becoming more or less
pulverulent and greenish-yellow. Apothecia small, aggregated
into clusters of 4 to 20, at first plane and marginate, becoming
convex and immarginate; paraphyses lax, black at the tips.
Exsico. Mudd n. 173.
Bab. On rocks and stones in mountainous districts.-B. M. Fre·
quent at Highcliff, Cleveland, Yorkshire (the only locality).
89. L. inserena Ny!. in Flora, Iii. 84 (1869).-Thallus thickish,
cinereous, glaucous grey, rimose-areolate or areolate-granulose,
the areolal plane, often occurring as scattered granules on a black
hypothallus. Apothecia black, plane or slightly convex; hypothecium
colourless, with an opaque white stratum in the lower
portion; paraphyses indistinct, bluish-black at the tips; spores
ellipsoid, oblong, 14-17 [J. long, 6-8 [J. thick; hymenial gelatine
sordid-blue, the asci becoming violet-coloured with iodine.­
Cromb. in Journ. Linn. 80£. (Bot.) xv. 487 (187]) & Lich. Brit. 85;
Leight. Lich FJ. 278; ed. 3, 280.
Resembling somewhat tumid forms of L. griseoatra, but well clis·
tinguished by the colourless hypotheciulll.
Hab. On granite rocks.-Distr. Very rare 011 the Grampians,
Scotland.-B. M. Ben Lawers, Perthshrre; Craig auio and Morrone,
13raemar, Aberdeenshire.
90. L. vitidans Leight. Lich. Fl. ed. 3, 271 (1879).-Thallus
effuse, thin, minutely granulose, yellowish-green or sordidgreenish
(Kf + yellowish, CaCI - K(CaCI) + orange-red); hypothallus
evanescent. Apothecia small, innate-sessile, at first
plane, and thickly margined, at length convex and Bubmarginate,