BRITISH LICHENS

OPEGRAPHA GRAPHIDACE.IE 263
margins often obliterated, otherwise as in the species.-Leight.
in Ann. Mag. Nat. Rist. ser. 2, xiii. 95 (1854); Mudd Man. 230;
f. notha Cromb. Lich. Brit. 97 (1870); Leight. Lich. Fl. 381
(lignicolous); ed. 3, 404. Lwhen nothus Ach. Lich. Suec. Prodr.
19 (1798). Opegrapha notha Ach. Meth. 17 (1803) pro parte;
Sm. Engl. Bot. t. 1890; Grev. Fl. Edin. 352. Alyxoria rwtha
S. F. Gray Nat. Arr. i. 504 (1821).
Exsicc. Johns. n. 463; Leight. n. 66.
Connected WIth the species by mtermediate forms, but generally
distinguished by the broader and more rounded apothecia.
Hab. On trees; t'ltrely on old paIings.-Distr. Coextensive with
the species.-B. .Jf. Lustleigh, Devon; near Bartley Lodge, New
Forest, Hants; MIllhiIl, MIddlesex; Eppmg Forest and UItmg, Essex;
Fishguard, Pembrokeshire; Malvern and TIbberton, Worcestershire;
Bardon HilI, LeIcestershire; Montford BridgC', near Shrewsbury and
Llanyblodwell, Shropshire; Llangollen, DenbighshIre; near Yarmouth.
Norfolk; Bilsdale, Ayton and near GUlsbrough, Cleveland, Yorkshire;
Levens and Lowther Park, Westmorland; Teesdale, Durham; Killin,
Perthshire; Muckross Demesne, Killarney, Kerry; Rostellan, near
Cork; Adare and near Limerick; near BallinakIll, Connemara, Galway.
Var. rimalis Fr. Lich. Eur. 365 (1831).-Apothecia short
or elongate, simple, straight or flexuose, narrow; disc narrow;
margins elevated, inflexed; spores usually 5- sometimes 4-septate.
-Mudd Man. 231 pro parte; subsp. nmalts Cromb. Lich. Brit.
D7 (1870); f. nmalis Leight. Lich. Fl. 383 (1871); ed. 3, 406;
O. rimalis Ach. Lich. Univ. 260 (1810); Carroll in Nat. Rist.
Rev. vi. 531 (1859). O. varia f. herbicola Leight. Lich. Fl. ed. 3,
406 (1879). O. diaphora var. herbicola Nyl. in Flora Ix. 463 (1877).
Exsicc. Leight. n. 192; Mudd n. 207.
Some of the lirelloo as in var. lutescens are yellowish·pruinose.
liuh. On trees, shrubs or ferns; rarely on wood.-Distr. Common
and coextensive with the species.-B. M. Withiel, Cornwall; Crawley,
Sussex; Epping Forest and Stansted Mountfitchet, Essex; Dolgclly,
Merioneth; Gopsall, Lcicestershire; Krldale and AIryholme Wood.
Cleveland, Yorkshire; Malvern, WorcestershIre; Ben Lawers and
Craig Tulloch, Blair Athole, Perthshire; Carrigogunnel, Limerick;
Doughruagh Mt., Connemara, Galway.
16. O. vulgata Ach. Meth. 20 (1803).-Thallus effuse, membranaceous,
smooth or cracked and scaly, sometimes pulverulent,
greyish-white or brownish. Apothecia prominent, scattered or
crowded, varying in size, short and roundIsh or oblong, or elongate,
slender, linear, sometimes bent and wavy, occasionally branched;
disc narrow, uniform; margins round, inflexed; hypothecium
dark-brown, paraphyses slender, branched above; epithecium
brown; spores colourless, elongate, narrowly fusiform, 5-7 -septate
(rarely 9-septate ?), 15-29 !l. long, 2-4 !l. thick, usually about,
25-27 !1. long, 3 !l. thick; spermogones with curved slender
spermatia, 14-16 !l. long or shorter, 1 !l. thick.-Eng). Bot. t