224 LICHENACET, | PLATYSMA. 
towards the circumference; laciniz 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, 0,004—6 mm. thick.—Carroll, 
Journ. Bot. 1866, p. 22; Cromb. Lich. Brit. p. 27; Leight. Lich. 
Fl. p. 101, ed. 3, p. 96.—Lichen Fahlunensis Linn. Sp. Pl. (1753) 
p. 1143; Eng, Bot. t. 653 (fig. only).— Vide sub P. Fahlunenst.— 
Brit. Exs.: Cromb. n. 25; Dicks. Hort. Sic. n. 23. 
Often confounded with the preceding, from which, apart from the 
characters of the thallus and the receptacle of the af aresoe it is distin- 
guished by the absence of any chemical reaction and by the form of the 
spermatia. The apothecia are numerous, chiefly central, sometimes be- 
coming large in old age. The spermogones usually very numerous, have 
short, simple sterigmata, 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.— Distr. Rather 
local, being confined to N. Wales, S. Scotland, and the Grampians, espe- 
cially those of Braemar, where it is plentiful.—B. M.: Carnedd Llewelyn 
and the Glyders, Carnarvonshire. New Galloway, Kirkcudbrightshire ; 
Ben Lawers and Hills near Amulree, Perthshire; Katelaw, Forfarshire ; 
Ben-naboord, Morrone, and Lochnagar, Braemar, Aberdeenshire; Ben 
Nevis, Inverness-shire, 
Form tenuisectum Cromb. Grevillea, xv. (1886) p. 49.—Lacinia 
narrower and more intricately crowded.—Cetraria commixta f. tenui- 
secta Fr, fil. Lich. Scand. (1871) p. 109. 
Connected with the type by intermediate states, and probably not con- 
stant; always sterile. 
Hab. 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; lacinie narrow or dilated. 
9. P. juniperinum Nyl. Act. Soc. Linn. Bord. sér. 3, i. (1857) 
p- 295.—Thallus ascending, lobato-laciniate, citrine or greenish- 
yellow on both sides, or somewhat paler beneath ; medulla intensely 
citrine ; laciniee crowded, eroso-crenate, crisp, concave (K~ , CaCl_). 
Apothecia adnate to the front of the laciniw, 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. 84; Cromb. Lich. Brit. p. 27; Leight. Lich. Fl. 
p. 102, ed. 3, p. 96.—Cetraria juniperina Gray, Nat. Arr. i. p. 482; 
Sm. Eng. Fl. v. p. 220; Mudd, Man. p. 79. Lichen juniperinus 
Linn. Sp. Pl. (1753) p. 1147. Lichen juniperinus Huds. Fl. Angl. 
p. 452; Lightf. Fl. Scot. ii. p. 836, apparently refers to some state 
of Physcia parietina, as observed in Eng. Bot. 194, and With. Arr. 
ed, 3, iv. p. 34 (cfr. Cromb. Journ. Bot. 1872, p. 234). 
