42 COLLEMACEI. [coLLEMA. 
long, 0,010-12 mm. thick.—Cromb. Grevillea, iii. p. 22; Journ. 
Bot. 1874, pp. 140, 333 ; Leight. Lich. Fl. ed. 3, p. 25. 
This rather inconspicuous plant is characterized by the apparently 
constantly granulose thallus. The only specimen gathered occurred in 
small scattered pulvinuli, most of which were infertile. The nature of 
the thallus and the form of the spores separate it from Leptogiwm mucro- 
phyllum, to which it bears a general resemblance. The apothecia are at 
first somewhat urceolate. ; 
Hab. On the bark of an old ash-tree in a wooded upland district. 
Distr. Known only from the 8. W. Highlands, Scotland.—-B. M.: Shores 
of Loch Katrine, Perthshire. 
b. Thallus acervulato-aggregate or pulvinato-congested. 
6. C. ceraniscum Nyl. Flora, 1865, p. 353.—Thallus small, 
cespitose, smooth, opaque, pulvinato-congested, -laciniato-divided, 
dark olive-greenish or olive-brown, divisions subrotundato-com- 
pressed, ceranoideo-dissected, somewhat obtuse and nodulose at the 
apices, erect or ascending. Apothecia small, somewhat concave, 
brownish-black, the thalline margin thin, smoothish ; spores (4—) 
8ne, ellipsoid, rounded at both apices, 2-6 transversely seriate and 
loculose, 0,027-34 mm. long, 0,018-21 mm. thick; paraphyses 
slender; hymenial gelatine bluish (the theca more intensely so): 
with iodine.—Carroll, Journ. Bot. 1865, p. 287; Cromb. Lich. Brit. 
p- 6; Journ. Bot. 1874, pp. 140, 333; Leight. Lich. Fl. p. 24, ed. 3, 
p. 17.—Collema ceranoides Mudd (non Borr.), Man. p. 4, pro parte. 
This very distinct species (of which Nylander has given me the above 
amended diagnosis) has the appearance of a larger condition of Synalissa 
symphorea. The thallus, which forms small pulvinuli, is often pale olive 
at the base, and has the gonimia moniliform. The apothecia, which are 
subconcolorous with the thallus, are not at all numerous in the specimens 
seen, ‘Thecharacter of the thallus with its crowded nodulose dark apices, 
and the form of the spores which are internally as if grossly botryoso- 
granulose, prevent this species being confounded with any other” (Nyl. » 
an Uitt.). 
Hab. On damp shaded rocks among small mosses in alpine places.—— 
Distr. Found only very sparingly among the 8. Grampians, Scotland. 
—B. M.: Summits of Ben Lawers and Craig Calliach, Perthshire. 
e. Thallus macrophylline, variously lobed. 
7. C. auriculatum Hoffm. Deutsch. Fl. ii. (1795) p. 98.—Thallus 
dilated, slightly rigid, roundly lobed, more or less granulate, opaque, 
sordid glaucous-green or olive-brown ; lobes irregularly repando- 
crenate, transversely rugulose (I+ blood-red). Apothecia moderate, 
scattered, concave, at length nearly plane, reddish-brown, the margin 
thick, entire; spores ovoid or ellipsoid, 3-septate, with a few longi- 
tudinal septa, 0,022-27 mm. long, 0,011-15 mm. thick.—Cromb. 
Journ. Bot. 1870, p. 96; Leight. Lich. Fl. p. 21, ed. 3, p. 17.—To 
this belongs Collema dermatinum Borr. Eng. Bot. Suppl. t. 2716. 
f, 2 (lower fig.). Var. membranacea Kremp., Cromb. Journ. Bot. 
