BRITISH LICHENS

GYALECTA OYALECTACElE 5
Craig Tulloch. Perthshire; Cuchullin Hills, Isle of Skye; Craig Ouie
and Morrone, Braemar, Aberdeenshire; Grogans Glen and Colin Glen,
near Belfast, Antrim; Ballaghbeama Gap, Kerry; Ballynahineh and
near Erriff, Connemara, Galway.
Var. marmorea Boist. Nouv. Fl. Lich. Fr. pt. 2,178 (1902).­
Distinguished from the species by the entire margin and by the
habitat.-W. G. Travis, Lanc. Nat. iii. 82 (1910).
Recorded on decayed moss. The condition of the margin scems
to be merely a growth phase that occurs in plants on lImestone as well
as in those on mosses.
Hab. On mosses on mortar of an old limestone wall at Downham,
Lancashire.
3. G. foveolaris Schoor. Enum. 94: (1850).-Thallus effuse,
granulose or subleprose, whitish or greyiflh-white (K -, CaCI-).
Apothecia moderate or somewhat large, numerous, scattered,
urceolate, flesh- or pale-rose-coloured, the margin thin, entire or
subcrenulate, paler; hypothecium colourless; paraphyses not
well discrete; spores oblong-ellipsoid, 3-septate, 18-21 (J. long,
6-7 (J. thick; hymenial gelatine bluish then sordid with iodine.­
Urceolaria foveolaris Ach. Meth. 14:9 (1803). Lecidea foveolaris
Ny!. in Mem. Soc. Cherb. v. 119 (1857); Carroll in Journ. Bot.
iv. 23 (1866); Cromb. Lich. Brit. 62; Leight. Lich. Fl. 334;
ed. 3, 359.
Resembles Gyalecta rubra in the form of apothecia and spores, but
differs in the absence of an outer thalline margin.
Hab. Incrusting decayed mosses on the ground in subalpine and
alpine regions.-Dtstr. Sparingly in Yorkshire and on the Grampmns.
Seotland.-B. ltf. Teesdale, Durham; Craig Calliach, Ben Lawers and
Killin, Perthshire; Morrone, Bracmar, Abcrdeenshire.
4. G. geoica Ach. Lich. Univ. 31 (181O).-Thallus effuse,
thin, subpulverulent, greyish (K -, Ca01-). Apotheeia minute,
urceolate, more or less immersed, pale yellowish-flesh-coloured,
the margin entire, persistent, whitish; hypothecium pale; paraphyses
somewhat coherent, clavate at the apices; spores oblong
or ellipsoid, 3-septate, usually 12-15 (J.long, 6-7 (J. thick; hymenial
gelatin; bluish then sordid-violet with iodine.-G. Wahlenbergiana
Aeh. Syn. 9 (1814:); Leight. Angioc. Lich. t. 13. f. 2. G. foveolaris
Mudd Man. 167 (1861) (non Schoor.). Lichen geoicus Wahlenb.
in Vet. Ak. Handl. 142, t. 4. f. 5 (1806). Lecidea geoica Ny!. in
Mem. Soc. Cherb. v. 119 (1857); Cromb. Lich. Brit. 62; Leight.
Lich. Fl. 333; cd. 3, 359.
Exsicc. Leight. n. 123.
Closely related to the preceding. with which at times it has been
confounded, but differs in the much smaller fructification and the
shortcr spores. The disc of the numerous, at times aggregate, apothecia
often collapses in age, so that. as in other plants of this section, they
appear whitish from the colour of thl' h,Ypothecium.