LEMMOBSIS | COLLEMACEX 65 
3. L. leptogiella A. lL. Sm.—Thallus effuse, coralloid-areolate, 
composed of extremely minute upright nodulose or irregular 
branchlets, with a well-developed cortex, dark olive-brown. 
Apothecia minute, slightly margined, brownish- or yellowish-red, 
the disc rather concave or at length almost plane ; paraphyses 
slender, discrete or partially coherent, very slightly thickened at 
the tips; spores oblong-ellipsoid, 10-17 » long, 5-7 pw thick ; 
hymenial g gelatine greenish- blue then tawny w mane -red with iodine. 
—Collemopsis leptogiella Nyl. in Flora lx. p. 220 (1877) ; Cromb. 
in Grevillea vi. p. 18 (1877) & Monogr. i. a 80; Leight. Lich. 
Fl. ed. 3, p. 36. 
The leptogioid structure and the Nostoc alga leave no doubt as 
to the inclusion of this species in Lemmopsis. The apothecia are 
numerous on the specimen, but difficult to detect. 
Hab. On quartzose shady rocks.—B. M. Kylemore, Connemara 
(the only locality). 
27. LEPTOGIUM 8. F. Gray Nat. Arr. i. p. 395 (1821). 
Collema sect. Leptogium Ach. Lich. Univ. p. 654 (1810). 
Collemodium Nyl. ex Lamy in Bull. Soc. Bot. Fr. xxv. p. 341 
(1878); Cromb. Monogr. i. p. 57. Scytenium 8. F. Gray Nat. 
Arr. i. p. 398 (1821). Mallotium 8. F. Gray tom. cit. p. 399; 
Mudd Man. p. 44. (PI. 27.) 
Thallus more or less gelatinous when moist, lobate, the lobes 
minute and almost granular or large and spreading, corticated. 
Algal cells Nostoc distributed through the thallus or sometimes 
zoned. Apothecia with a thalline * margin of plectenchyma ; 
paraphyses simple, conglutinate ; spores 8 in the ascus, variously 
elongate, blunt or pointed at the ends, septate and muriform, 
colourless. Spermogones with septate sterigmata and minute 
pleurogenous spermatia. 
Differs from Collema in the corticate thallus, a very distinct 
character in some species, in others difficult to distinguish, especially 
in some of those included by Nylander in the genus Collemodium. 
As a rule the thallus is less swollen than in Collema, the lobes being 
often very thin. 
A. Cortical cells somewhat indistinct (Collemodium). 
Growing on trees. 
1. L. fragrans Cromb. Lich. Brit. p. 8 (1870) (excl. syn. 
Mudd Man. p. 46).—Thallus composed of small nodulose lobules, 
generally crowded in cushion-like masses or effuse and coarsely 
granular-areolate, the lobules erect, crenate, somewhat dilated 
and appressed at the circumference, dark-green or olive-brown. 
Apothecia small, numerous, crowded, concave, reddish-brown, 
the margin entire, paler ; spores ovoid-ellipsoid, 3—5-septate and 
muriform, 16-28 » long, 8-11 » thick.—Leight. Lich. Fl. p. 30: 
pro parte; ed. 3, p. 50. LD. microphyllum Leight. Lich. Fl. ed. 3, 
r. F 
