PLATYSMA. | CETRARIEI. 225 
Our few authentic specimens are typical, though smaller than in 
countries where it is more plentiful. he apothecia do not occur in 
these, and the spermogones are rarely seen. They are minute, marginal, 
with spermatia 0,007 mm. long, 0,001 mm, thick. 
Hab. On the trunks of aged pines in mountainous woods.—Distr. Ex- 
tremely local and rare in the N. Grampians, Scotland; very deubtfully in 
N. England.—B. M.: ? Near High Force Inn, Teesdale, Durham (frt.). 
Clova, Forfarshire ; Rothiemurchus Woods, Inverness-shire. 
10. P. pinastri Nyl. Flora, 1869, p. 442.—Thallus depressed, 
roundly lobed, greenish-yellow; lacini plane, somewhat broad, 
sometimes imbricate, the margins intensely citrino-sorediate; medulla 
deep citrine (K_—, CaCl_). Apothecia as in the preceding species, 
but very rare.—Platysma juniperinum, subsp. pinastré Cromb. Journ. 
Bot. 1872, p. 234.  Platysma juniperinum var. pinastrt Cromb. 
Lich. Brit. p. 27; Leight. Lich. Fl. p. 102, ed. 3, p. 97. Cetraria 
pmastri Gray, Nat. Arr. i. p. 432. Cetraria juniperina 6. pinastri 
Hook. Fl. Scot. ii. p. 57 pro parte; Sm. Eng. Fl. v. p. 220 ; Mudd, 
Man. p. 79. Lichen pinastri Scop. Fl. Carn. ii. (1772) p. 382; 
Dicks. Crypt. fasc. iii. p. 18; With. Arr. ed. 3, iv. p. 51; Eng. Bot. 
t. 2111. 
This holds the same relation to P. juntperinum, of which it has usually 
been considered a variety, as P. ulophyllum does to P. sepincola, except 
with respect to size. It is distinguished from the preceding by being 
smaller, with broader and more appressed lobes, and by the bright citrine- 
coloured marginal soredia. The colour of the medulla in both species, as 
observed by Nylander, J. c., depends upon the presence of vulpuline. 
Neither apothecia nor spermogones are seen in our British specimens. 
Hab. On the trunks of old firs and on larch pales in upland wooded 
districts — Distr. Very local and rare in E. and N. England, and in the 
Grampians, Scotland.—B. M.: Framlingham, near Norwich, Norfolk; 
Holwick, Yorkshire; Teesdale, Durham; near Kendal, Westmoreland. 
Ben Lawers, Perthshire ; Woods of Rothiemurchus, Inverness-shire. 
b. Thallus subascending, somewhat loosely affixed, discolorous ; 
lacinie dilated. 
11, P. glaucum Nyl. Act. Soc. Linn. Bord. sér. 3, i, (1857) p. 295. 
—Thallus foliaceo-expanded, ascending, smooth or lacunoso-rugulose, 
laciniate or laciniato-lobed, glaucous-grey or pallescent, beneath 
brownish or blackish, paler at the circumference; laciniss more or 
less ascending, sinuate, crenate, or lacerate, often sorediate at the 
margins (KtIowish, Gacl—), Apothecia marginal, adnate, 
moderate or somewhat large, reddish-brown, the margin thin, evan- 
escent; spores ellipsoid, 0,006-9 mm. long, 0,035-50 mm. thick.— 
Nyl. Syn. i. p. 314, t. 8. f 85; Cromb. Lich. Brit. p. 27; Leight. 
Lich. Fl. p. 102, ed. 3, p. 97.—Cetraria glawea Gray, Nat. Arr. i. 
p. 483; Hook. Fl. Scot. ii. p. 57; Sm. Eng. Fl. v. p. 220; Tayl. in 
Mack. Fl. Hib. ii. p. 154; Mudd, Man. p. 79, t. 1. £20. Lrchen 
glaucus Linn, Sp. Pl. (1753) p. 1148; Huds. Fl. Angl. p. 453; 
Lightf. Fl. Scot. ii. p. 888; With. Arr. ed. 3, iv. p. 53; Eng. Bot. 
a 
