62 LBCANO-LBCIDBBI [lBCIDBA 



with iodine. — Carroll in Journ. Bot. iv. p. 24 (1866) ; Gromb. 

 Lich. Brit. p. 79 ; Leight. Lich, Fl. ed. 3, p. 272. 



Has been confused with the continental species L. Wulferm, 

 which has a whitish tartareous thallus and spreads over mosses in 

 alpine situations. 



Hah. On the earth in alpine places. — Distr. Bare, found only on 

 the summits of the highest hills in Scotland. — B. M. Ben Lawers, 

 Perthshire. 



102. L. subfurva Nyl. in Flora lii. p. 360 (1872).— Thallus 

 indeterminate, thinnish or submoderate, areolate-dififract, above 

 minutely furfuraceous and opaque, brownish-black or greyish- 

 brown (K —, CaCl—) ; hypothallus black, little visible. Apo- 

 thecia small, plane, wrinkled, opaque, often angulose, margined, 

 black, the margin thin, persistent ; paraphyses slender, irregu- 

 larly coherent; epithecium and hypothecium dark (K— ) ; spores 

 subglubose, ellipsoid, 0,011-12 mm. long, 0,009 mm. thick; 

 hymenial gelatine deep-blue with iodine. — Cromb. in Grevillea i. 

 p. 61 : Leight. Lich. Fl. ed. 3, p. 250. 



Viewed superficially might readily be taken for a species allied to 

 L. furvella. The analytical characters, however, of the fructification 

 show that it belongs to this section near L. inferior Nyl. a Lapland 

 plant. The thallus spreads extensively over the substratum, and is 

 fertile only towards the centres — -the apothecia being usually some- 

 what scattered. 



Hab. — On micaceous rocks and walls in upland situations. — Distr. 

 Very local, though plentiful, where it occurs among the Central 

 Grampians, Scotland. — B. M. Craig Tulloch and Glen Pender, Blair 

 Athole ; also by Loch Earn and Ben Lawers, Perthshire. 



103. L. deparcula Nyl. in Flora Iv. p. 361 (1872).— Thallus 

 determinate, scattered, thin, subareolate, at times nearly evan- 

 escent, greyish (K— , CaCl — ); hypothallus blackish, only here 

 and there visible. Apothecia small, slightly prominent, some- 

 what difform, subumbonate in the centre, marginate, black, 

 concolorous within, the margin obtusely turgid, at times sub- 

 crenate ; paraphyses nearly moderate, bluish-green towards the 

 apices ; epithecium dark-bluish ; hypothecium brownish- black ; 

 spores ellipsoid, 0,009-12 mm. long, 0,005-7 mm. thick; hy- 

 menial gelatine deep-blue then dark with iodine. — Cromb. in 

 Grevillea i. p. 62 ; Leight. Lich. Fl. ed. 3, p. 311. 



A rather inconspicuous plant. The gonidia, as noted by Nylander, 

 are subglobose, 0,004-12 mm. in diameter. The specimens gathered 

 are for the most part sterile. 



Hab. On calcareous stones in alpine locaUties. — Distr. Extremely 

 local; rare on the Grampians, Scotland.^ — B. M. Summit of Ben-y- 

 gloe, Blair Athole, Perthshire ; Morrone, Braemar, Aberdeenshire. 



104. L. dealhatula Nyl. in Flora Ivii. p. 315 (1874).— 

 Thallus subdeterminate, thin, rimose or subareolate, white (K — , 



