IECAXORA.] LECANO-LECIDEEI. 483 



long, 0,002 mm. thick ; paraphyses usually jointed ; hymenial 

 gelatine bluish with iodine. Cromh. Grevillea, xix. p. 58. 

 Lecanora castanea (Ram.) form perccenoides Nyl. Bull. Soc. Bot. t. x. 

 (1863) p. 268. 



Looks in some respects as if intermediate between L. alaucocarpa and 

 L. sqitamulosa, but is veiy different in the characters of the thallus and 

 the apothecia. The single British specimen is scarcely typical. 



Hob. On calcareous rocks in an upland situation, Distr. Found only 

 in S. W. England. B. M. : Near Yatton, Somersetshire. 



185. L. peliocypha Nyl. Not. Sallsk. pro F. et Fl. Fenn. Forh. 

 n. ser. v. (1866) p. 182. Thallus areolato-diffract or verrucoso- 

 squamulose, thickish, somewhat shining, the squamules often 

 crenate, slightly convex, cervine-brown, blackish beneath (K(CaCl) ). 

 Apothecia at first immersed, then plane or slightly convex, papillose 

 in the centre, reddish-brown, naked, the thalline margin persistent, 

 crenulate and flexuose ; spores oblongo-cylindrical, 0,003-5 mm. 

 long, 0,0010-15 mm. thick ; hymenial gelatine bluish, then wine-red 

 with iodine. Cromb. Grevillea, xix. p. 58. Parmelia peliocypha 

 "Wahl. in Ach. Meth. Suppl. (1803) p. 41. 



A plant of an alpine type which might readily be confounded with the 

 following, especially with its variety, from which the negative reactions 

 of the thallus and the papillate apothecia keep it distinct. The single 

 fragmentary British specimen gathered is well fertile. 



Hab. On an exposed granitoid boulder in an alpine situation. Distr. 

 Only very sparingly on one of the N. Grampians, Scotland. B. M. : The 

 Braeriach, Braeuiar, Aberdeenshire. 



186. L. fuscata Nyl. Flora, 1872, p. 364. Thallus appressed, 

 areolato-squamulose, pale-chestnut or cervine-brown, opaque, the 

 squamules angular and sublobate, blackish beneath (K(CaCl) + 

 reddish). Apothecia at first punctiformi-impressed, minute, then 

 concave, small, difformi-angulose and rimose, reddish- or dark-brown, 

 the thalline margin thin, flexuose ; paraphyses not discrete ; spores 

 oblongo-cylindrical, 0,003-4 mm. long, 0,001-0,0015 mm. thick; 

 hymenial gelatine (especially the thecse) tawny wine-red with 

 iodine. Cromb. Grevillea, xix. p. 58 ; Lich. Brit. p. 56 pro minima 

 parte ; Leight. Lich. Fl. p. 186 pro parte, ed. 3, p. 17 pro parte. 

 Lichen fuscatus Schrad. Spicil. Fl. Germ. (1794) p. 83. Acarospora 

 cervina (Pers.) Mudd, Man. p. 158 pro maxima parte. Lecanora 

 cervina Cromb. Lich. Brit. p. 56 pro parte. Psoroma cervinum Gray, 

 Nat. Arr. i. p. 444. Lichen squamulosus Eng. Bot. t. 2011 (male). 

 Lecanora squamulosa Hook. Fl. Scot. ii. p. 350; Sm. Eng. Fl. v. 

 p. 187 pro parte. Brit. Exs. : Leight. n. 24 ; Mudd, n. 131. 



Differs from L. squamulosa, from which it has frequently not been 

 rightly discriminated, in the form of the thalline squamules, their 

 chemical reaction, and the colour of their under surface, as also in the 

 character of the apothecia. As in all the allied plants the hypothallus is 



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