lecidea] lecideace^ 73 



Form oxydata Leight. Lich. Fl. ed. 3, p. 304. — Thallus rusty- 

 red or yellowish. Apothecia confluent or scattered. 



Hah. On rocks. — Distr. Somewhat rare in mountainous districts. — 

 B. M. Beddgelert, Merioneth ; Achosragan Hill, Appin, Argyll ; Ben 

 Lawers, Perthshire ; Morrone, Braemar, Aberdeenshire. 



122. L. cinerascens A. L. Sm.— Thallus determinate or 

 subefFuse, cracked-areolate, whitish or glaucous-white (K — , 

 CaCl — , medulla I -(- bluish) ; hypothallus whitish, at times 

 limiting the thallus. Apothecia submoderate, at first innate, 

 plane, with whitish-sutfused epithalline margin, at length convex, 

 prominent and immarginate, black, naked or slightly pruinose ; 

 hypothecium thick, blackish ; paraphyses slender, conglutinate, 

 dark at the apices; spores ellipsoid, 0,010-13 mm. long, 

 0,005-7 mm. thick ; hymenial gelatine deep-blue with iodine. — 

 Lecidea speirea Ach. Meth. p. 52 (1803) in Vet. Ak. Handl. 

 1808, p. 263 ; Cromb. in Grevillea xii. p. 57. L. contigua var. 

 speirea Cromb. Lich. Brit. p. 80. Lichen speireus Ach. Prodr. 

 p. 59 (1798). Lichen cinerascens^ iih. Arr. ed. 3, iv. p. 8 (1796) ; 

 Cromb. in Grevillea xii. p. 57. 



Scarcely distinct from the preceding, but differs in the pseudo- 

 lecanorine apothecia, which are usually more scattered and solitary 

 though at times subconfluent. 



Hah. On rocks, schistose and calcareous, in mountainous regions. 

 — Distr. In N. England, the Highlands of Scotland, and W. Ireland. — 

 B. M. Alston, Cumberland ; Achosragan Hill, Appin, Argyll ; Craig 

 Calliach, Ben Lawers, Killin, and Craig Tulloch, Blair Athole, Perth- 

 shire ; Canlochan, Forfarshire ; Morrone, Braemar, Aberdeenshire ; 

 Ballaghbeama Gap, Kerry ; Kylemore, Connemara, Galway. 



123. L. Mooreana Carroll in Nat. Hist. Rev. vi. p. 529 (1859). 

 — Thallus effuse, thin, greenish-yellow or brown, greyish-white 

 when dry. Apothecia large, black, sessile, solitary or aggregate 

 into little groups, plane, somewhat rough, the margin thin, 

 entire ; hypothecium thin, dark-brown ; paraphyses slender ; the 

 whole hymenium gelatinous ; spores ovate, small, 0,007-10 mm. 

 long, 0,004 mm. thick ; hymenial gelatine yellow-brown with 

 iodine.— Mudd Man. 207; Cromb. Lich. Brit. p. 82; Leight. 

 Lich. Fl. p. 275 ; ed. 3, p. 275. 



Hah. — On rocks. — B. M, Crow Glen, Belfast (the only locality). 



124. L. promiscens Nyl. in Flora Iv. p. 358 (1872).— Thallus 

 effuse, very thin, cracked-areolate, whitish (K — , CaCl — , 

 I + dark-violet), often evanescent. Apothecia adnate, moderate, 

 plane, thinly margined, at length slightly convex and immar- 

 ginate, black, concolorous within ; paraphyses slender, clavate, 

 jointed and black at the apices ; hypothecium brown (NO^ rose- 

 coloured) ; spores oblong, 0,008-14 mm. long, 0,003-4 mm. thick ; 

 hymenial gelatine deep-blue, asci at length wine-red, with 

 iodine. — Cromb. in Journ. Bot. xxii. p. 275 (1882). 



