COLLEMA | COLLEMACEX 51 
Var. pulposulum Nyl. ex Cromb. in Journ. Bot. xii. p. 147 
(1874).—Thallus scattered or but little developed, with small 
lobes. Apothecia numerous, small or large and irregular ; spores 
fusiform-oblong, 3-septate with 1 or 2 longitudinal divisions, 
20-28 » long, 7-10 thick.—Leight. Lich. Fl. ed. 3, p. 19. 
Collema pulposulum Nyl. in Act. Soc. Linn, Bord. v. p. 59 
(1864), 
Ezsice. Johns. n. 281. 
Differs from the species chiefly in the larger spores. 
Hab. On old walls in shady places.—B. M. Near Cirencester, 
Gloucestershire, and Blackhall Rocks, Durham (maritime). 
6. C. concinnum Flot. in Linnea xxii. p. 361 (1849) & xxiii. 
p. 157 (1850).—Thallus rather small, orbicular, lobed, olive- 
brown or dark-glaucous-green, the lobes round or variously cut 
and narrow, more or less ascending or depressed. Apothecia 
submoderate in size, plane, reddish, with entire margin ; spores 
ovoid, 3-septate, or submuriform, 14-20 long, 6-9» thick or 
larger.—Cromb. in Journ. Bot. xx. p. 272 (1882). 
Eesicce. Larb. Lich. Hb. without a number. 
A somewhat indefinite species midway between C. pulposwm and 
C. tenax, differing from the former in the flatter lobes, from the latter 
in the more superficial apothecia. 
Hab. On rocks and wall-tops in maritime districts.—Dzstr. Local 
and rare in §.W. England, N. Wales and W. Ireland.—B. M. Near 
Penzance, Cornwall; Barmouth, Merioneth; Achnanure Castle, 
Galway. 
7. C. tenax Sm. Engl. Bot. t. 2349 (1811).—Thallus thickish, 
dark-greenish or bluish-green, lobed, the lobes imbricate, roundish 
and obtuse, or crenate and subpalmate (I + reddish). Apothecia 
moderate in size, innate, reddish, with an entire margin often 
becoming larger and irregularly convex ; spores ovoid or oblong, 
3-septate, with a longitudinal septum, 18-25 p long, 7-10 » thick. 
—Hook. in Sm. Engl. Fl. v. p. 209; Mudd Man. p. 39. C. pul- 
posum var. tenax Cromb. Lich. Brit. p. 4 (1870); Leight. Lich. 
Fl. p. 19; ed. 3, p. 19. Lichen tenax Swartz in Nov. Act. R. 
Soe. Sci. Ups. iv. p. 249 (1784). Enchylium tenax 8S. F. Gray 
Nat. Arr,i. p. 397 (1821). 
Exsicc. Larb. Lich. Hb. n. 201 ; Leight. n. 105 as C. limosum ; 
Mudd n. 1. 
Closely allied to the preceding, differing chiefly in the habitat, and 
in the more spreading thinner crenate or palmate lobes, which are 
often of a glaucous colour. 
Hab. Among mosses on rocks and on the bare ground in inland 
districts. — Distr. Rather rare throughout England, S. Wales, S. and 
W. Highlands of Scotland and in W. Ireland.—B. M. Luccombe, Isle 
of Wight; Ardingly Rocks, Hurstpierpoint and Eastham, Sussex; 
near Ightham, Kent; Reigate, Surrey; Mendip, Somersetshire ; St. 
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