= 
COLLEMA] COLLEMACE 53 
Crypt. Fase. iv. p. 25. Enchylium crispum 8S. F. Gray Nat. 
Arr. i. p. 396 (1821). 
Ezasicc. Mudd n. 3; Larb. Cesar. n. 52 & Lich. Hb. n. 203; 
Carroll Lich. Hib. n. 40; Johns. n. 5, 
Hudson’s name Lichen crispus has priority, but it has been 
employed for another Collema. There is considerable variation in the 
form of the lobes, but usually it may be recognized by the minute over- 
lapping central lobes and the more expanded ones at the circumference, 
as well as by the rhizine. The Nostoc chains are frequently broken 
up into groups somewhat like those of Synechoblastus multipartitus. 
Above all, it is distinguished, when fertile, by the very large spores. 
Hab. On the mortar of old walls, rarely on calcareous rocks, chiefly 
in inland situations.—Dvistr. General and usually common in the 
Channel Islands and most parts of Great Britain and Ireland.—B. M. 
Quenvais, Jersey; near Ventnor and Shanklin, Isle of Wight; St. 
Minver, Cornwall; Rottingdean and Falmer, Sussex; Reigate Hill, 
Surrey; Walthamstow and Saffron Walden, Essex; Bathampton 
Downs, Somerset; near Cirencester, Gloucestershire; Oaksey, Wilts ; 
Cradley and near Malvern, Worcestershire; near Oswestry and near 
Shrewsbury, Shropshire ; Caer Leon, Monmouthshire ; near Barmouth, 
Merioneth; Milton and near Cuddesdon, Oxfordshire; Thetford, 
Norfolk; Ayton and Pinchingthorpe, Cleveland, Yorkshire; Kendal, 
Westmoreland; Arlecdon and near Whitehaven, Cumberland; near 
Darlington, Durham; near Edinburgh; near Glasgow; Appin, Argyll; 
Killin, Perthshire; near Aberdeen; Fort William, Invernessshire ; 
Mallow and near Cork; near Kylemore, Galway; Clare Island, Mayo. 
Form nudum Leight. Lich. Fl. ed. 3, p. 20 (1879).—Thallus 
paler in colour with somewhat broader naked lobes, the smaller 
lobes undeveloped.—Cromb. Monogr. i. p. 50. C. erispum var. 
nudum Scher. Enum. Lich. p. 257 (1850) nomen. 
Hab. On the mortar of old walls.—Distr. Somewhat scarce in 
S. and W. England, S. and W. Highlands of Scotland and S. Ireland. 
—B.M. Near Torquay; Little Danny, Sussex; near Cirencester; 
near Farlow, Shropshire; Ben Lawers, Perthshire; Killarney and 
Dunkerron, Kerry. 
Form monocarpum Cromb. in Journ. Bot. xii. p. 334 (1874) 
& Monogr. i. p. 50.—Thallus with minute lobes or almost 
obliterated, and visible chiefly round the apothecia.—Leight. 
Lich. Fl. ed. 3, p. 20 ; var. monocarpum Cromb. in Journ. Bot. xii. 
p. 147 (1874). Collema monocarpum Duf. ex Nyl. Syn. Lich. i. 
p- 111 (1858). 
Hab. On the mortar of old walls, rarely on calcareous rocks in 
maritime and inland situations.—Distr. Scarce in S. and S.W. England. 
—B. M. Shanklin, I. of Wight; Hastings and Glynde, Sussex; near 
Cirencester, Gloucestershire. 
Thallus lobes smooth (rarely slightly granular), somewhat 
erect and crowded. 
9. C. multifidum Scher. Enum. p. 254 (1850) (incl. vars. 
complicatum and marginale, excl. var. polycarpon).—Thallus 
