118 LECANO-LECIDEEI [bIATORINA 



thin, une(iual, pale or whitish (K — , CaCl — ), often evanescent. 

 Apothecia small, at first plane, with thin white epithalline 

 margin, then convex and immarginate, pale-brown, sordid- or 

 pale-reddish, colourless within ; paraphyses concrete, pale at the 

 apices ; hypothecium colourless; spores 8-16 in the ascus, oblong 

 or oblong-fusiform, 1-2-septate, 0,009-16 mm. long, 0,004-5 mm. 

 thick ; hymenial gelatine bluish then wine-red or violet with 

 iodine.— Lccidea ci/rtella Ach. Meth. p. 67 (1803); S. F. Gray 

 Nat. Arr. i. p. 471 ; Cromb. Lich. Brit. p. 72 ; Leight. Lich. Fl. 

 p. 318 ; ed. 3,, p. 341. L. anomala Ach. Syn. p. 38 (1814) pro 

 parte ; Hook, in Sm. Engl. Fl. v. p. 182 pro parte. Lichen 

 cyrteUus Sm. Engl. Bot. t. 2155 (1810). 

 Exsicc. Larb. Lich. Hb. n. 173. 



Eeferred sometimes to Lecania (Lccanoracea^) on account of the 

 thin epithalline margin which disappears soon, the species becoming 

 wholly biatorine. The spores are usually of the 1 -septate type of 

 Biatorina, though in the same apothecia there are to be found 

 2-septate spores like those of Bilimhia. 



Hah. On the bark of trees. — Distr. Not unfrequent throughout 

 the British Isles.— JB. M. Launceston, Cornwall; Shankhn, I. of 

 AVight; Cockington, Devon; Henfield, Sussex; Hadleigh Woods, 

 Southend, Essex ; Farmington and near Cirencester, Gloucestershire ; 

 Thame Park, Oxfordshire ; Malvern, Worcestershire ; Ayton, Cleveland, 

 Yorkshire ; Glen Falloch, Perthshire ; Kiverstone, near Cork ; Mount 

 Shannon and Tervoe, Limerick ; Dromoland, Clare. 



15. B. Griffithii Massal. Rio. Lich. p. 134 (1852) pro parte ; 

 Mudd Man. p. 176. — Thallus effuse, thin, unequal or subgranular 

 and wrinkled, whitish or greyish-white (K + yellow, CaCl — ), 

 occasionally nearly obsolete. Apothecia small or submoderate, 

 adnate, plane, at length slightly convex, margined, brownish- 

 flesh-coloured, dull-brown or blackish, the margin thin, pale ; 

 13araphyses more or less discrete, dark or yellowish at the apices ; 

 hypothecium colourless ; spores fusiform or oblong, thinly 1- 

 septate, 0,010-20 mm. long, 0,035-45 mm. thick; hymenial 

 gelatine deep-blue then more or less sordid-wine-coloured with 

 iodine. — Lichen Griffithii Sm. Engl. Bot. t. 1735 (1807). Lecidea 

 Griffithii Hook, in Sm. Engl. Fl. v. p. 177 (1833); Tayi. in 

 Mackay Fl. Hib. ii. p. 120 ; Cromb. in Grevillea xxii. p. 11 (incl. 

 f. limitata Cromb.). L. tricolor Nyl. Lich. Scand. p. 207 (1861) 

 (non With, vide Grevillea xii. p. 60) ; Cromb. Lich. Brit. p. 72 ; 

 Leight. Lich. Fl. p. 321 ; ed. 3, p. 337. Biatora mixta Fr. in 

 Yet. Acad. Handl. 1822, p. 267. 



Exsicc. Bohl. n. 119 ; Mudd n. 155 ; Leight. n. 60 (as Biatora 

 tmxta) ; Larb. Lich. Hb. nos. 268, 345. 



The original specimens were collected b^^ Griffith and preserved 

 in Withering's herbarium labelled Lichen corneus. Withering's 

 description and figure of L. corneus do not agree with these specimens 

 (see p. 9), as was pointed out by Smith (Engl. Bot. 1. 1735), who 



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