224 LICHEXACET, TpLATTSMA. 



towards the circumfc-rence ; laciuioe somewhat ascending, much en- 

 tangled, subplane or plane, crisp (K~, CaCl~). Apothecia mode- 

 rate, brownish-red, the receptacle smoothish, margin nearly entire ; 

 spores ellipsoid, 0,005-11 mm. long, 0,001-6 mm. thick.— Carroll, 

 Journ. Bot. 1S66, p. 22 ; Cromb. Lich. Brit. p. 27 ; Leight. Lich. 

 Fl. p. 101, ed. 3, p. 96. — Lichen Fahluneasis Linn. Sp. PI. (1753) 

 p. 1143; Eng. Bot. t. 653 (fig. only). — Vide sub P. Fahlunemi. — 

 Brit. Exs. : Cromb. n. 2o ; Dicks. Hort. Sic. n. 23. 



Often confounded with the preceding, from which, apart from the 

 characters of the thalhis and the receptacle of the apothecia, it is distin- 

 guished by the absence of any chemical reaction and by the form of the 

 spermatia." The apothecia are numerous, chiefly central, R.)metira«>s be- 

 coming large in old age. The spermogones usually very numerous, have 

 short,'simpie steria-mata, and spermatia oblongo- or fusiformi-ellipsoid, 

 0,003-4 mm. long,' 0,0015-20 mm. thick. 



Hab. On rocks and boulders chiefly in alpine situations.— D/^^f/-. Rather 

 local, being confined to X. Wales, S. Scotland, and the (.Trampians, espe- 

 ciallv those of Braemar, where it is plentiful.— B. M. : Carnedd Llewelyn 

 and "the Glyders. Carnarvonshirf^. New Galloway, Kirkcudbrightshire ; 

 Ben Lawers and Hills near Amuhee, Perthshire; Katelaw, Forfarshire : 

 Ben-niboord, Morroue, and Lochnagar, Braemar, Aberdeenshire ; Ben 

 Nevis, Inverness-shire. 



Form tenuisectiim Cromb. Grevillea, xv. (1S86) p. 49.— Lacinire 

 narrower and more intricately crowded. — Cetmria commixia f. tenni- 

 secti Fr. fil. Lich. Scand. (1871) p. lo9. 



Connected with the type by intermediate states, and probably not con- 

 stant ; always sterile. 



Hfih. On rocks in alpine situations. — Distr. Local and scarce on the 

 Grampians, Scotland.— B. M. : Ben Lawers, Perthshire; Morrone, Brae- 

 mar, Aberdeenshire. 



C. Spermatia acicular, cylindrical, slightly incrassate at one apex. 



a. Thallus suberect or appressed, somewhat loosely affixed, 

 concolorous ; laciniaj narrow or dilated. 



9. P. j-imiperiiium Xyl. Act. Soc. Linn. Bord. ser. 3, i. (1857) 

 p. 295. — Thallus ascending, lobato-laciniate, citrine or greenish- 

 yellow on both sides, or somewhat paler beneath ; medulla intensely 

 citrine; lacinise crowded, eroso-crenate, crisp, concave (K_,CaCl). 

 Apothecia adnate to the front of the lacinise, moderate, badio- 

 reddish or badio-brownish, the margin corrugate or denticulate : 

 spores ellipsoid, 0,006-9 mm. long, 0,004-6 mm. thick.— Nyl. Syn. 



i. p. 312, t. 8. f. 34; Cromb. Lich. Brit. p. 27; Leight. Lich. Fl. 

 p. 102, ed. 3, p. 96. — Cttraria jninperina Gray, Xat. Arr. i. p. 432; 

 Sm. Eng. Fl. v. p. 220 : Mudd, Man. p. 79. Lichen juinperimis 

 Linn. Sp. PL (1753) p. 1147. Liclun juniperimis Huds. Fl. Angl. 

 p. 452 ; Lightf. Fl. Scot. ii. p. 836, apparently refers to some state 

 of Ph)/scia j>nrieti)ni, as observed in Eng. Bot. 194, and With. Arr. 

 ed. 3. iv. p. 34 {cfr. Cromb. Journ. Bot. 1872, p. 234). 



