BRITISH LICHENS

110 CYCLOCARPINElE LECIDEA
black, somewhat convex, iinmarginate, dispersed or conglomerate
in dense orbicular groups; hypothecium dark-brown; paraphyses
coherent, dark-brown towards the apices; spores linear-oblong,
12-17 !1. long, 3-6 11. thick; hymeriial gelatine and asci blue then
\Vine-red with iodine.-L. symphorella Nyl. in Flora lxiii. 35 (1870);
Cromb. in Journ. Bot. viii. 99 (1870); Leight. Lich. Fl. 301; ed. 3,
286. L. amphfJtera Leight. ex Cromb. in Journ. Bot. ix. 179
(1871) & Lich. Fl. 283; ed. 3, 287.
Exsicc. Cromb. n. 89.
Hab. On granitic and sandstone rocks.-Distr. Rare in mountainous
places, N. Scotland.-B. JJf. Dan Hill, Westmorland; Ben
Lawers, Craig Tulloch, Ben-y-Gloe, Blair Athole, Perthshire; Canlochan,
Forfarshire; Morrone, Braemar and Hill of Ardo, Aberdeenshire;
Sligo Mountains.
203. L. commaculans Ny!. in Flora Ii. 476 (1868) -Thallus
effuse, thin, opaque, subareolate, the areolal scattered, depressed,
greyish- or brownish-black (K -, CaCl-). Apothecia sub moderate ,
slightly convex, scarcely margined, black; hypothecium thickish,
reddish-brown, the colour passing into the hymenium; paraphyses
concrete; epithecium blackish; spores oblong, 8-11 !1. long,
3-4 !1. thick; hymenial gelatine bluish with iodine.-Cromb. in
J ourn. Bot. vii. 106 (1869) & Lich. Brit. 93; Leight. Lich. Fl. 282 ;
ed. 3, 287.
Considered by Nylander to approach L. kajanita (Lich. Scand. 245),
a Scandinavian plant, but differs in the form of the spores and especially
in the colour of the hypothecium. From L. expansa Nyl. it is separated
by the hypothecium and also by the larger immarginate apothecia.
The spermogones here and there visible have the spermatia cylindrical,
straight, O-ll !1. long, 1 !1. thick.
Hab_ On a felspathic boulder, and quartzose stones in an alpine
situation.-B. M. Summit of Morrone, Braemar, Aberdeenshire.
PARARITIC ON OTHER LICHENS, OFTEN CLASSIFIED
,WITH FUNGI.
204. L. vitellinaria Nyl. in Bot. Not. 1852, 177.-Thallus
absent. Apothecia sessile, minute, concave, at length plane,
margined black, the margin slightly prominent, shining; hypothecium
thin brownish; paraphyses conglutinate, greenish-black
at the apices; spores ellipsoid with a thick outer wall, 10-12 !1.
long, 6!1. thick; hymenial gelatine bluish then violet with iodine.­
Mudd Man. 212, t. 3, f. 77; Cromb. Lich. Brit. 78; Leight. Lich.
Fl. 355; ed. 3, 384.
Exsicc. Leight. n. 182.
In structure the apothecia are very similar to Lecidea parasema
(Nyl. Lich. Scand. 218). Recently it has been classified by Rehm as
a fungus under Nesolechia (Rabenh. Krypt. Fl. iii. 319 (1896)).
Hab. Parasitic on the thallus of Candelariella vitellina,' recorded
more rarely on Lecidea lactea. On rocks in upland situations.-Distr.