LECANORA.] LECANO-LECIDEEI. 411 



83. L. allophana Nyl. Flora, 1872, p. 250, nota 2. Thallus 

 determinate, unequal, rugose or granulato-corrugate, whitish or 

 greyish- white (K -f yellowish, CaCl ). Apothecia moderate, plane or 

 slightly convex, brown or brownish-black ; the thallinc margin entire, 

 at length subcrenate and flexuose ; paraphyses slender, not discrete 

 at the apices ; epithecium continuous (not granulose) ; spores 0,013- 

 22 mm. long, 0,008-12 mm. thick ; hymenial gelatine bluish, the 

 thecae violet-coloured with iodine. Cromb. Grevillea, xviii. p. 68. 

 L. subfusca form allophana Cromb. Lich. Brit. p. 51 ; Leight. Lich. 

 Fl. p. 200, ed. 3, p. 185. L. subfusca rj. allophana Ach. Lich. Univ. 

 (1810) p. 395. Lichen subfuscus Huds. Fl. Angl. p. 444 pro parte ; 

 Eng. Bot. t. 219. Lichenoides crustaceum et leprosum scutellis sub- 

 fuscis Dill, in Ray Syn. ed. 3, p. 71 pro parte; Muse. 134, t. 18. 

 fig. 16. Brit. Exs. : Leight. n. 116 pro parte ; Bohl. n. 35. 



At one time Ny lander, like some other authors, regarded this as the 

 type of L. subfusca. This i.s so far warranted also by its being Lichen 

 subfuscus Linn. (Fl. Suec. 1755, p. 409) pro maxima parte, according to 

 specimens in his own herbarium ; but it is better to adopt the nomen- 

 clature of Acharius as having a definite signification. It differs from 

 L. subfusca chiefly in the more rugose thallus, the form of the thalline 

 margin of the apothecia, the more conglutinate paraphyses, the smaller 

 spores, and the size of the spermatia, which (Jide Nyl. in litt.) are 0,018- 

 24 mm. long. 



Hab. On trunks of trees from maritime to upland districts. Dixtr. 

 Not uncommon in England ; apparently rare in N. Wales, the S.W. 

 Highlands of Scotland, and S.W. Ireland ; probably often overlooked. 

 B. M. : Bury St. Edmund s, Suffolk ; Lyndhurst, New Forest, Hants ; St. 

 Leonard's Forest, Sussex; Lustleigh, S. Devon; Windsor Great Park, 

 Berkshire ; Twycross, Leicestershire ; near Worcester ; near Shrews- 

 bury, Shropshire ; Aberdovey, Merionethshire ; Ayton, Cleveland, York- 

 shire. Finlarig, Killin, Perthshire ; Inverary, Argyleshire. Castle- 

 connell, co. Limerick. 



89. L. epibryon Ach. Syn. (1814) p. 155; Nyl. Flora, 1872, 

 p. 250. Thallus subdeterminate, verruculose or granuloso-con- 

 crescent, white (K + yellowish, CaCl ). Apothecia somewhat large, 

 plane, brown or reddish-brown ; the thalline margin thin, entire, 

 often flexuose ; paraphyses slender ; epithecium non-granulose ; 

 spores 0,014-23 mm. long, 0,008-11 mm. thick : hymenial gelatine 

 bluish, the thecse at length dark-wine-red with iodine. Cromb. 

 Grevillea, xviii. p. 68. Lecanora subfusca var. epibryon pro parte 

 Mudd, Man. p. 147; Cromb. Lich. Brit. p. 51; Leight. Lich. Fl. 

 p. 203, ed. 3, p. 187. Lichen epibryon Ach. Prodr. (1798) p. 79. 



Usually confounded by British authors with terricolous states of var. |3 

 of L. subfusca. It is, however, a plant of a more alpine type, and is well 

 characterized by the much larger apothecia and spores. Ihe only British 

 specimen is well fertile ; but the few speimogones visible have become 

 partially abraded. These elsewhere (fde Nyl. in litt.) have the spermatia 

 0,015-18 mm. long. 



Hab. On decayed mosses on the ground in mid-alpine situations. 



