ECANORA.] LKCAXO-LECIDF.KI. •>"'•» 



A well-marked species wliioii is ratlier variable in dilVtM-ent regions. 

 Thoiif^h recorded by Lt'i;jrhlon, /. r. fid' Dr. Stirton, it is a very doubtful 

 Britisli plant, and is not at all likely t > iiave occurred in the locality .npe- 

 cified, since it is certaiiily absent on the higher mts. of the vicinity. 



Hah. On granitic and schistose rocks in alpine places. — Dtstr. Re- 

 ported as gathered on YtQW Jh-echt, Argyleshire. 



5. L. cartila^nea Ach. Lich. Univ. (1810) p. 415.— Thallus 

 expanded, cartilaginous, imbrrcato-laciiiiate, somewhat shining, pale 

 ochroleucous or greenish-straw-coloured ; laciui;o narrow, linear or 

 sublinear, whitish beneath, slightly dilated, dichotomously divided 

 or inciso-lobed or crenate at the apices (K — ). Apothecia large, 

 somewhat plane, fleshy- or tawny-testaceous, the thalline margin 

 entire or crenulate ; spores oblong or oblongo-ellipsoid, 0,01 l-KJ 

 mm. long, 0,005-6 mm. thick. — Cromb. Grevillea, xviii. p. 44. — 

 Squamaria cartilai/inea Borr. Eng. Bot. Suppl. t. 2802 ; Mudd, Man. 

 p. 128 ; Cromb. Emim. p. 44 ; Leight. Lich. Fl. p. 172, ed. 3, p. 158. 

 Lichen cart'dag incus Ach. Vet. Ak. Haudl. (1795) p. 133, t. v. f. 4. 



Intermediate between the preceding and the following species, to the 

 one or other of which it approaches in difterent regions, but diff-rs fr.)m 

 both in the characters of the lacinise. In our Britisli specimens the thallus 

 is pulvinate, as it usually is elsewhere. The apothecia are numerous, be- 

 coming at length irregularly lobed and angulose. 



Hah. On a single rock in a maritime locality. — J)isfr. With certainty 

 only in N. Wales, though reported also from Yorkshire (^c/e Leighton). — 

 B. M. : Near the outlet of Llyn Bodlyn, above Barmouth, Merioneth- 

 shire. 



6. L. saxicola Ach, Lich. Univ. (iSlO) p. 431.— Thallus orbi- 

 cular, moderate or somewhat large, appressed, areolato-crustaceous 

 in the centre, radiate at the circumference, greenish- or pale-ochro- 

 leucous : radii contiguous, plane or subplicate, crenate at the apices. 

 Apothecia small or moderate, plane or somewhat convex, pale- or 

 brownish-testaceous, the thalline margin thin, entire or crenulate ; 

 spores ellipsoid, 0,010-16 mm. long, 0,006-7 mm. thick. — Cromb. 

 Grevillea, sii. p. 61 ; Tayl. in Mack. Fl. Hib. ii. p. 140.—Sqna- 

 viaria saxicola Sm. Eng. Bot. v. p. 197 ; Mudd, Man. p. 129 ; Cromb. 

 Lich. Brit. p. 44 ; Leight. Lich. Fl. p. 173, ed. 3, p. 158. Placodium 

 saxicolum Graj', Xat. Arr. i. p. 447. Liclien saxicola Poll. PI. Pal. 

 (1777) p. 225; Eng. Bot. t. 1695. LicJien niumlis Dicks. Crypt, 

 fasc. i. p. 11 ; With. Arr. iv. p. 29. — Brit. Exs.: Leight. n. 145; 

 Mudd, n. 92 ; Larb. Lich. Hb. n. 213 ; Bohl. n. 55. 



A rather variable plant which may be recognized from its British allies 

 by the thallus being thinner, radiate, appressed, and areolate in the centre. 

 Sometimes it is less appressed when it is rather thicker (approaching L. 

 cartilaginea), and occasionally it is eftiise and somewhat scattered. The 

 apothecia are numerous and crowded, becoming flexuose and ditfonn 

 from mutual pressure, with the margin at times flexuoso-crisp. Other 

 and more marked differences in the thallus and apothecia give rise to the 

 varieties and subspecies that follow. 



2a 



