LECANOn.V.] LKCANO-LECIDEEI. 405 



crcnulatc (K — , CaCl — ). Apothccia minute, innate or sli;?htly 

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

 thickisli; spores 8noD, subellipsoid, simple, 0,010-14 mm. lonf?, 

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

 apices ; hymonial gelatine bluish with iodine, — Cromb. Grevillea, 

 viii. p. 112. 



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

 ditlers among other characters in the larger spores. The thallus spn-ads 

 very extensively over the 8ubstratuni in the Scottish habitat, but Wiis 

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

 specimens s:athored are plentiful, with spermatia arcuate, 0,018-25 mm. 

 h)ng, 0,0000 mm. thick. 



Hub. 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: cd. 3, 

 p. ISS. — Thallus subdispersed, thin, smooth, unequal, rimoso- 

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

 frequent mastoid papilhu (K — , OaCl — ). Apothecia moderate, 

 adnatc, badio-reddish or brownish-black ; the thnlline maro;in dis- 

 tinct, entire, at length flexuose ; spores ellipsoid, 0,(123-27 mm. 

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

 less ; hyraenial gelatine bluish, the thecce at length tawny-violet 

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



Easily recognized by the peculiar somewhat fragile papilla} with 

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

 With us it is for the most part only sparitmly i'ertile, the apothecia be- 

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

 minute, 0,0015 mm. long, 0.0005 mm. thick. According to Nylander, 

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

 athuity is with L. coinplanafa Koerb. 



Ilab. On micaceous rocks in alpine situations. — Distr. Local find scarce 

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

 Calliach, Perthshire. 



102. L. oculata Ach. Syn. (1814) p. 148. -Thallus effuse, more 

 or less dacty lino-papillate, glabrous, white or greyish-white (K-f- 

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

 apices of the papilla^ moderate, somewhat concave or nearly plane, 

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

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

 paraphyses branched (epithecium K-f- violet) ; hymenial gelatine 

 not tinged, but the theca) 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. 173. — Rinodina ocidata Gray, Xat. Arr. 

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

 pro parte ; Sm. Eng. Fl. v. p. 232 pro parte. LirJien ondnfuft 

 Dicks. Crypt, fasc. ii. (1790) p. 17, t. 0. fig. 3; With. Arr. ed. 3, iv. 

 p. 7. 



2h 



