LECAXORA.] LECANO-LECIDEEI. 465 



crennlate (K , CaCl ). Apothecia minute, innate or slightly 

 emersed, plane or somewhat convex, hlackish, the thalline margin 

 thickish; spores 8nae, subellipsoid, simple, 0,010-14 mm. long, 

 0,007-8 mm. thick ; paraphyses stout, discrete, brownish at the 

 apices ; hymenial gelatine bluish with iodino. Cromb. Grevillea, 

 viii. p. 112. 



Allied to L. complanata Koerb., of which it may be a subspecies, but 

 differs among other characters in the larger spores. The thallus spreads 

 very extensively over the substratum in the Scottish habitat, but was 

 only here and there well fertile. The spermogones, however, in the few 

 specimens gathered are plentiful, witli sperniatia arcuate, 0,018-25 mm. 

 long, 0,0000 mm. thick. 



Hab. On a mica-schist rock in an alpine situation. Distr. Only 

 sparingly on one of the S. Grampians, Scotland. B. M. : Above Loch- 

 na-Gat, Ben Lawers, Perthshire. 



161. L. leucophyma Leight, Lich. Fl. (1871) p. 204: ed. 3, 

 p. 188. Thallus subdispersed, thin, smooth, unequal, rimoso- 

 diffract, pale or pale-greyish, internally yellowish, sprinkled with 

 frequent mastoid papilla? (K , CaCl ). Apothecia moderate, 

 adnate, badio-reddish or brownish-black ; the thnlline margin dis- 

 tinct, entire, at length flexuose ; spores ellipsoid, 0,023-27 mm. 

 long, 0,011 mm. thick; paraphyses slender; hypothecium colour- 

 less ; hymenial gelatine bluish, the thecas at length tawny-violet 

 with iodine. Cromb. Grevillea, xix. p. 57. 



Easily recognized by the peculiar somewhat fragile papillae with 

 which the thallus is covered, and which are often of a pinkish colour. 

 With us it is for the most part only sparingly fertile, the apothecia be- 

 coming dark in age. The spermogones are more common, with spennatia 

 minute, 0,0015 mm. long, 0,0005 mm. thick. According to Nylander, 

 who describes it, ' Flora,' 1879, p. 204, s. n. Lecanora acceptanda, its 

 affinity is with L. complanata Koerb. 



Hab. On micaceous rocks in alpine situations. Distr. Local find scarce 

 on the Grampians, Scotland. B. M. : Summit of Ben Lawers and Craig 

 Calliach, Perthshire. 



162. L. ocnlata Ach. Syn. (1814) p. 148. -Thallus effuse, more 

 or less dactylino-papillate, glabrous, white or greyish-white (K + 

 yellowish, then rusty-red, CaCl). Apothecia innate in the 

 apices of the papillae, moderate, somewhat concave or nearly plane, 

 naked, black ; the thalline margin tumid, entire ; thecse subcylin- 

 drical; spores ellipsoid, 0,020-30 mm. long, 0,011-14 mm. thick ; 

 paraphyses branched (epithecium K + violet) ; hymenial gelatine 

 not tinged, but the thecoe bluish with iodine. Hook. Fl. Scot. ii. 

 p. 47 : Mudd, Man. p. 156 ; Cromb. Lich. Brit. p. 56 ; Leight. 

 Lich. FL p. 200, ed. 3, p. l73.Einodina oculata Gray, Nat. Arr. 

 i. p. 449. Isidium oculatum Turn, and Borr. Lich. Br. p. 103 

 pro parte ; Sm. Eng. Fl. v. p. 232 pro parte. Lichen ontlatvs 

 Dicks. Crypt, fasc. ii. (1790) p. 17, t. 6. fig. 3 ; With. Arr. ed. 3, iv. 

 p. 7. 



