302 LICHENACEI. [PHYSCIA. 
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; Leight. Lich. Fl. p. 144, ed. 3, p. 138. 
—Borrera intricata Mudd, Man. p. 104. Lichen intricatus Desf. 
Fl. Atl. ii. (1800) p. 420, t. 258. f. 3. Borrera Atlantica Gray, 
Nat, Arr. i. p.485; Sm. Eng. Fl.v. p. 223. Lichen Atlanticus Sm. 
in Eng. Bot.t.1715. Lichenotdes subhirsutum teres, scutellis parvis 
nigris Dill. Muse. 157, t. 21. f. 51.—Brit. Hvs.: 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 laciniz 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 0,008-4 
mm. long, scarcely 0,001 mm, thick, are more frequent. 
Hab. On rocks and trunks of old trees in maritime districts.-—Distr. 
Only in 8. 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. Fl. 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, 
ceesio-pruinose or naked, brownish-black, the margin entire, crenate 
or ciliate; spores oblong, 0,0380-50 mm. long, 0,018-24 mm. 
thick.—Cromb. Lich. Brit. p. 38; Leight. Lich. Fl. p. 145, ed. 3, 
p. 183.—Borrera ciliaris Gray, Nat. Arr. i. p. 484; Hook. FI. Scot. 
ii. p. 56; Sm. Eng. Fl. v. p. 226; Mudd, Man. p. 105. Luehen 
ciharig Linn. Sp. Pl. (1758) p. 1144; Huds. Fl. Angl. p. 448; 
Lightf. Fl. Scot. ii. p. 828; With. Arr. ed. 3, iv. p. 55; Eng. Bot. 
t. 1852. Lichenoides hispidum majus et rigidius, seutellis nigris 
Dill. Muse. 150, t. 20. f. 45. Lichenoides arboreum foliosum cine- 
reum, scutellis niyris, foliorum eatremitatibus hispidis et pilosis Dill. 
in Ray Syn. ed. 3, p. 73, n. 67.— Brit. Hxs.: Mudd, n. 77; Leight. 
n. 364; Cromb. n. 50; Larb. Casar. n. 68; Lich. Hb. n. 125; 
Bobl. n. 38. 
A rather variable plant as to thallus and apothecia. The thallus may 
have the lacinie 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 8. England with the laciniz approaching to var. erinalis (Schl., 
Scher.), but not sufficiently typical. The apothecia, when present, are 
plentiful, becoming at length naked and darker, with the receptacular 
margin very variable, being frequently with us in the same specimen 
