302 L1CHENACE1. [PHTSCIA. 



sometimes slightly convex, brownish-black, the margin black, entire ; 

 spores dark-brown, 0,018-26 mm. long, 0,011-15 mm. thick. 

 Cromb. Lich. Brit. p. 37; Lcight. Lich. PI. p. 144, ed. 3, p. 133. 

 Borrera intricata Mudd, Man. p. 104. Lichen intricatus Dtsf. 

 PL Atl. ii. (1800) p. 420, t. 258. f. 3. Borrera Atlantica Gray, 

 Nat. Arr. i. p. 435 ; Sm. Eng. PL v. p. 223. Lichen Atlanticus Sm. 

 in Eng. Bot. t. 1715. Lichenoides subhirsutum teres, scutellis parvis 

 nigris Dill. Muse. 157, t. 21. f. 51. Brit. Exs. : Mudd, n. 76; 

 Cromb. n. 49. 



A well-marked species, at first sight somewhat resembling narrower 

 states of P. villosa, which does not occur so far north as the British Isles, 

 but differing from it at once in the colour of the apothecia. The thallus 

 sometimes spreads extensively, and the lacinise vary somewhat in length. 

 As observed by Nylander (Syn. i. p. 409), the whitish villosity of the 

 thallus, which occasionally becomes more or less evanescent, consists of 

 hollow filaments scarcely articulate. The apothecia are extremely rare 

 in this country, but the spermogones, which have the spermatia 0,003-4 

 mm. long, scarcely 0.001 mm. thick, are more frequent. 



Hub. On rocks and trunks of old trees in maritime districts. Distr. 

 Only in S. England, in one or two places on the coast of Sussex. B. M. : 

 Bracklesham in Selsey Island, near Chichester, and cliffs near Hastings 

 (fruit), Sussex. 



7. P. ciliaris DC. PI. Fr. ii. (1805) p. 396. Thallus diffuse, sub- 

 ascending or decumbent, loosely adherent, lineari-laciniate, greenish- 

 grey or greyish-brown ; beneath pale, canaliculate ; lacinise multifid, 

 imbricato-intricate, the margins, especially towards the apices, 

 ciliate, with long fibrils (K~, CaCl~). Apothecia pedicellate, large, 

 caesio-pruinose or naked, brownish-black, the margin entire, crenate 

 or ciliate ; spores oblong, 0,030-50 mm. long, 0,018-24 mm. 

 thick. Cromb. Lich. Brit. p. 38 ; Leight. Lich. PL p. 145, ed. 3, 

 p. 133. Borrera ciliaris Gray, Nat. Arr. i. p. 434 ; Hook. PI. Scot. 

 ii. p. 56; Sm. Eng. PL v. p. 226; Mudd, Man. p. 105. Lichen 

 ciliaris Linn. Sp. PL (1753) p. 1144; Huds. PL Angl. p. 448; 

 Lightf. PL Scot. ii. p. 828 ; With. Arr. ed. 3, iv. p. 55 ; Eng. Bot. 

 t. 1352. Lichenoides hizpidum majus et rifjidius, scutellis nifjris 

 Dill. Muse. 150, t. 20. f. 45. Lichenoides arboreum foliosum cine- 

 reum, scutellis niyris, foliorum extrcmitatibiis hispidis et pilosis Dill, 

 in Kay Syn. ed. 3, p. 73, n. 67. Brit. Exs. : Mudd, n. 77 ; Leight. 

 n. 364 ; Cromb. n. 50 ; Larb. Ca-sar. n. 68 ; Lich. Hb. n. 125 ; 

 Bohl. n. 38. 



A rather variable plant as to thallus and apothecia. The thallus may 

 have the lacinise longer or shorter, broader or narrower, often more or 

 less white-pulverulent, with pale or sordid flexuose cilia. In colour it 

 varies from greyish to greyish-brown or cervine according to nature of 

 habitat, but when moist it is constantly greenish. States occasionally 

 occur in S. England with the Iaciiria3 approaching to var. crinalis (Schl., 

 Scbajr.), but not sufficiently typical. The apolhecia, when present, are 

 plentiful, becoming at length naked and darker, "witli the receptacular 

 margin very variable, being frequently with us in the same specimen 



