202 r.RAPHiDKi [lfcanactis 



WorcestcM-sliirc ; l^radgaio Park, Tjoicestcvshiro ; TTarborou^'li Magna, 

 Warwicksliirc ; Nannaii, Dolgclly, Merionetli ; Abdon and Haiigh- 

 iHond Hill, Hhropshiic ; Ickworth, Suflblk ; Nottinghamshire; Derby- 

 shire ; Kildale, Cleveland, Yorkshire ; Castle Bernard Park, Bandon, 

 Cork ; Derryquin, Kerry ; Adare Abbey, Limerick. 



Vai'. saxicola A. L. Sm. — Thallus gi-eyish-green, thin, fur- 

 furaceous, Apothecia black, sessile, greenish-pruinose or naked, 

 otherwise as in the species. Schismatomina premneum var. saxi- 

 colum Mudd Man. p. 222 (1861). LecAdaa premnca f. saxicola 

 Leight. Lich. FI. ed. 3, p. 365 (1879). 



Exskc. Leight. n. 185 ; Mudd n. 198 ; Larb. Lich. Hb. n. 73. 



Differing mainly in the habitat. Leighton distinguishes two 

 other saxicolous forms : teiclwgena and crcnatula {Lecidea premnea 

 f. teicliogena Nyl. ex Leight. I. c, and f. crcnatula Nyl. ex Leight. 

 I. c), both with scanty or evanescent thallus, the apothecia naked, 

 the margin somewhat crenulate or flexuose in the latter. 



Hab. On rocks, walls, &c. — Distr. Eare in the Channel Islands, 

 England and W. Ireland. — B. M. La Moye, Jersey ; Ventnor, I. of 

 Wight ; Nesscliffe, Shropshire ; Airyholme Wood, Cleveland, York- 

 shire ; Doughruagh Mt., Kylemore, Connemara, Galway. 



2. L. abietina Koerb. Syst. Lich. Germ. p. 276 (1855).— 

 Thallus white or greyish-white, effuse, thin, furfuraceous (K — , 

 CaCl — ). Apothecia moderate in size or larger, sessile, with a 

 thickish, prominent margin, black, but thickly whitish- or 

 pale-yellowish-pruinose ; hypothecium black ; paraphyses slender 

 conglutinate ; epithecium brownish ; spores acicular-fusiform, 

 3-septate, 0,035-40 mm. long, 0,004-4 mm. thick ; hymenial 

 gelatine slightly bluish then wine-red with iodine.^ — Lichen 

 abietinus Ach. in Vet. Acad. Handl. xvi. p. 139, t. 5, i. 7 

 (1795). Sphseria leucocephala Pers. Byn. Fung. Add. p. xxvii. 

 (1801) {spermogoniiferou^). Verrucaria leucocephala Ach. Meth. 

 p. 116 (1803); Borr. in Engl. Bot. Suppl. t. 2642, f . 2 ; 

 Hook, in Sm. Engl. Fl. v. p. 152 ; Tayl. in Mackay Fl. Hib. ii. 

 p. 90. Pyrenotliea leucocephala Fr. Lich. Eur. p. 450 (1831) ; 

 Leight. Angioc. Lich. p. 65, t. 28, If. 1 & 2. Lecidea ahietina Ach. 

 Lich. Univ. p. 188 (1810) ; S. F. Gray Nat. Arr. i. p. 468 ; Hook, 

 in Sm. Engl. Fl. v. p. 179 ; Cromb. Lich. Brit. p. 90 ; Leight. 

 Lich. Fl. p. 330 ; ed. 3, p. 354. Schismatomma ahietinum Massal. 

 Ric. Lich. p. 56, f. 102 (1852) ; Mudd Man. p. 223. 



Exsicc. Leight. nos. 163 & 164 ; Mudd n. 200 ; Johns, n. 349. 



Differs from the preceding in the dense whitish pruina covering 

 more especially the apothecia. The spermogones {Sphitria leuco- 

 cephala) which have rather large spermatia (0,012-16 nnn. long, 

 0,003-4 mm. thick), are sometimes alone present, and resemble small 

 whitish-grey globules. Leighton (Angioc. Lich. pp. 66 & 67, t. 28, 

 ff. 6 & 7) describes two somewhat similar forms : Pyrenothea rudis 

 {Exsicc. n. 102 as P. vermicellifcra) and P. aphanes (Verrucm-ia 

 rudis and V. aphanes Borr. Engl. Bot. Suppl. t. 2642, ff. 1 and 3 

 (1830) ). These are also quoted by Hooker in Sm. Engl. Fl. v. p. 151, 



