BRITISH LICHENS
BRITISH LICHENS
BRITISH LICHENS
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LECANACTIS LECAN ACTIDACElE 223<br />
Moccas Court and Brampton Bryan Park, Herefordshlre; Norton,<br />
Worcestershire; Bradgate Park, Leiccstershue; Harboro' Magna<br />
and Packington Park, Warwickshire; Nannau, Dolgelly, Merioneth ;<br />
Abdon and Haughmond Hill, Shropshire; Ickworth, Suffolk; Nottmghamshirc;<br />
Derbyshire; Kildale, Cleveland, Yorkshire; Castle Bernard<br />
Park, Bandon, Cork; Derryquin, Kerry; Adare Abbey, LimerIck.<br />
Var. saxicola A. L. Sm.-Thallus greyish-green, thin, furfuraceous.<br />
Apothecia black, sessile, greenish-pruinose or naked,<br />
otherwise as in the species. Schismatomma premneum var. saxicolum<br />
Mudd Man. 222 (1861). Lecidea premnea f. saxicola<br />
Leight. Lich. Fl. ed. 3, 365 (1879).<br />
Exsicc. Leight. n. 185; Mudd n. 198; Larb. Lich. Hb. n. 73.<br />
Differing mainly in the habitat. Leighton distinguishes two<br />
other saxicolous forms: teichoycna and crenatula (Lecidea premnea<br />
f. tcichoyena Nyl. ex Leight. l. c., and i. crenatula Ny!. ex Leight. l. c.),<br />
both with Bcanty or evanescent thallus, the apothecia naked, the<br />
margin somewhat crenulate or flexuose in the latter.<br />
Hab. On rocks, walls, &c.-Distr. Rare in the Channel Islands,<br />
England and W. Il'eland.-B. 111. La Moye, Jersey; Ventnor, I. of<br />
Wight; Nesscliffe, Shropshire; Airyholme Wood, Cleveland, Yorkshire;<br />
Doughruagh Mt., Kylemore, Connemara, Galway.<br />
2. L. abietina Koerb. Syst. Lich. Germ. 276 (1855).-Thallus<br />
white or greyish-white, effuse, thin, furfuraceous (K -, CaCl-).<br />
Apothecia moderate in size or larger, sessile, with a thickish,<br />
prominent margin, black, but thickly whitish- or pale-yellowishpruinose;<br />
hypothecium black; paraphyses slender, conglutinate;<br />
epithecium brownish; spores acicular-fusiform, 3-septate, 35-40 (.L<br />
long, 4-6 (.L thiek; hymenial gelatine slIghtly bluish then wine-red<br />
with iodinc.-Lichen abietinus Ach. in Vet. Acad. Handl. xvi.<br />
139, t. 5, f. 7 (1795). Sphwria leucocephala Pers. Syn. Fung.<br />
Add. xxvii. (1801) (spermogoniiferous). Verrucaria leucocephala<br />
Ach. Meth. 116 (1803); Borr. in Engl. Bot. Suppl. t. 2642, f. 2<br />
Hook. in Sm. Engl. Fl. v. 152; Tayl. in Mackay Fl. Hib. ii. 90.<br />
Pyrenothea leucocephala Fr. Lich. Eur. 450 (1831); Leight.<br />
Angioc. Lich. 65, t. 28, ff. 1 & 2. Lecidea abietina Ach. Meth.<br />
54 (1803); S. F. Gray Nat. Arr. i. 468; Hook. in Sm. Engl. F!.<br />
v. 179; Cromb. Lich. Brit. 90; Leight. Lich. Fl. 330; ed. 3,<br />
354. Schismatomma abtetinum Massa!. RlC. Lich. 56, f. 102<br />
(1852); Mudd Man. 223.<br />
Exsicc. Bohl. n. 115 (as Verlucaria leucocephala); Leight<br />
nos. 163 & 164; Mudd n. 200; Johns. n. 344.<br />
Differs from the preceding in the dense whitish pnnna covering<br />
more especially the apothecul.. The spermogones (Sphrona leucocephala)<br />
which have rather large spermatla (12-16 (.L long, 3--4 !L thick),<br />
are sometimes alone present, and resemble small whitish.grey globules.<br />
Leighton (Angioc. Lich. 66 & 67, t. 28, ff. 6 & 7) describes two somewhat<br />
similar forms: Pyrenothea rudis (Exsicc. n. 102 as P. vermicelliferal<br />
and P. aphanes (Verrucana rudis Borr. Eng). Bot. Supp). t. 2637,