150 CYCLOCARPINE® [CETRARIA 
nessshire; near Forres, Elginshire; Hills of Applecross, Rossshire ; 
Loch Shin, Sutherland; Killarney, Lough Brui and Finnchey Bridge, 
Kerry. 
Var. fallax Ach. Lich. Univ. p. 509 (1810).—Thallus white 
beneath or only partially black, often fimbriate or coralloid at 
the margins.—Hook. Fl. Scot. ii. p. 57 & in Sm. Engl. FI. v. 
p- 220; Mudd Man. p. 80. Lichenoides membranaceum, tubz 
Fallopiane wemulum Dill. Hist. Muse. p. 165, t. 22, fig. 58. 
Lichen fallax Web. Spicil. Fl. Goett. p. 244 (1778); Dicks. PI. 
Crypt fasc. i. p. 13; With. Arr. ed. 3, iv. p. 53; Engl. Bot. 
t. 2373. Platysma glauca f. fallax Nyl. Syn. Lich. i. p. 314 
(1860); Leight. Lich. Fl. p. 103 (incl. f. coralloidea); ed. 3, 
p. 98 (incl. f£. coralloidea); Cromb. Monogr i. p. 226; var. 
fallax Cromb. Lich. Brit. p. 27 (1871). 
Exsice. Mudd n. 55. 
Distinguished by the partially white colour of the under surface 
and more or less by the fimbriate margins of the lobes. Perhaps 
more a growth form than a variety, as it generally occurs in moist or 
shady conditions. 
Hab. On the trunks of old trees in shady woods, rarely on moist 
rocks in upland districts.—Dzistr. Local and scarce in §.W. and N. 
England, Central Scotland and $.W. Ireland.—B. M. Helminton, 
Cornwall; Dartmoor, Devon; Tunbridge Wells, Kent; Garth, Dol- 
gelly, Merioneth; Ingleby Park, Cleveland, Yorkshire; Alston, Cumber- 
land; near Inverary, Argyll; Glen Falloch, Glen Lochay and Finlarig, 
Killin, Perthshire; Sidlaw Hills and Deerhill Wood, Forfarshire ; 
Glen Nevis, Invernessshire. 
Var. tenuisectum A. L. Sm.—Thallus darker in colour, the 
lacinie short, narrow, much divided and crowded in a panniform 
manner. Platysma glaucum f. tenuisectum Cromb. in Grevillea 
xv. p. 49 (1886) nomen; var. tenuisectum*Cromb. Monogr. i. 
p-. 227 (1894). 
Distinguished by the much divided lobes. Crombie suggests that 
the darker colour may be due to the habitat. 
Hab, On exposed boulders in mountainous regions.— Distr. Rather 
local, though not uncommon in the mountainous regions of England 
and Scotland.—PB. M. Stiperstones, Shropshire ; Clougha, Lancashire ; 
Creanlarich and Ben Lawers, Perthshire; Morrone, Braemar, Aber- 
deenshire ; Glen Nevis, Invernessshire. 
2. C. lacunosa Ach. Meth. p. 295 (1803).—Thallus broadly 
foliaceous-lobate, reticulate-lacunose, whitish- or bluish-grey, the 
lobes crenate-undulate, incised, rounded at the apices; beneath 
blackish, pale-brown towards the circumference (K + yellowish, 
CaCl). Apothecia prominent, moderate in size or rather large, 
reddish-brown, the margin entire ; spores ellipsoid, 6-8 pw long, 
4—5 p thick.—Platysma lacunosum Nyl. in Mém. Soc. Sci. Nat. 
Cherb. v. p. 100 (1857); Carroll in Journ. Bot. iii. p. 288 
(1865); Cromb. Lich. Brit. p. 27; Leight. Lich. Fl. p. 103; 
ed. 3, p. 98. 
