46 COLLEMACEI. [COLLEMA. 



Var. /3. pulposulum Nyl. ex Cromb. Journ. Bot. 1874, p. 147. 

 ThaUus smaller, granuloso-lobulate, scattered or but little developed. 

 Apothccia rather small, numerous : spores oblong or fusiformi-oblong, 

 3-septate, with 1 or 2 longitudinal septules, 0,020-28 mm. long, 

 0,007-0,010 mm. thick. Leight. Lich. FL ed. 3, p. 19. Collema 

 pulposulum Nyl. Act. Soc. Linn. Bord. xxv. (1864) p. 7. 



A distinct variety well characterized by the granulose, dispersed thallus, 

 and the form of the spores. It is much smaller than the type, though 

 externally similar. 



Hob. On old walls in shady upland situations. Distr. Local and scarce 

 in W. England, though no doubt overlooked elsewhere. B. M. : Near 

 Cirencester, Gloucestershire. 



11. C. tenax Ach. Syn. (1814) p. 314. Thallus imbricato- 

 lobed, thickish, dark-glaucous or dark-greenish ; lobes round, obtuse, 

 inciso-crenate or subpalmate at the margins (I -f reddish). Apo- 

 thccia moderate, innate, concave, reddish, the margin entire, scarcely 

 prominent ; spores ovoid or oblong, 3-septate, with a longitudinal 

 septum, 0,018-25 mm. long, 0,009-10 mm. thick. Sm. Eng. Fl. 

 v. p. 209 ; Mudd, Man. p. 39 ; Cromb. Journ. Bot. 1874, p. 333. 

 Collema pulposum var. tenax Cromb. Lich. Brit. p. 4 ; Leight. Lich. 

 Fl. p. 19, ed. 3, p. 19. Enchylium tenax Gray, Nat. Arr. i. p. 397. 

 Lichen tenax Swrtz. N. Act. Ups. iv. (1784) p. 2i9.Srit. Exs. : 

 Leight. n. 105, 290 ; Mudd, n. 1 ; Larb. Lich. Hb. n. 201. 



Distinguished from C. pulposum by the inciso-dentate or subpalmate 

 thalline lobes, the innate apothecia, the less prominent receptacle, the 

 larger spores, and the reaction with iodine. The apothecia are usually 

 scattered and not numerous. 



Hab. Among mosses on rocks, and on the bare ground in upland 

 districts. Distr. Local and rather scarce where it occurs, throughout 

 England, in S. Wales, the S. and W. Highlands, Scotland, and in 

 N.W. Ireland. B. M. : Runton and Cromer, Norfolk ; near Ightham, 

 Kent; Reigate, Surrey; Luccombe, Isle of Wight; the Mendips, Somer- 

 setshire ; Hathrop Castle, Gloucestershire ; near Bewdley, Claines, and 

 Malvern, Worcestershire ; Pentregaer, Oswestry, Shropshire ; Tenby, 

 Pembrokeshire ; near Ayton, Cleveland, Yorkshire ; near Brigsteer, 

 Westmoreland; Keswick, Cumberland. Appin and Island of Lismore, 

 Argyleshire ; Killin, Perthshire. Kylemore, co. Galway. 



Var. ft. coronatum Koerb. Par. (1865) p. 413. ThaUus rather 

 thinner and more appressed ; apothecia sessile, plane or slightly con- 

 vex, with subentire margin, often large and confluent. Cromb. Journ. 

 Bot. 1882, p. 272. Collema pulposum var. cristatum Mudd, Man. 

 p. 39. Collema cristatum Sm. Eng. Fl. v. p. 208 ; Tayl. in Mack. 

 Fl. Hib. ii. p. 108. Lichen cristatus Huds. Fl. Angl p 447- 

 Lightf. Fl. Scot. ii. p. 821 ; With. Arr. ed. 3, iv. p. 75. Lichenoides 

 gelatinosum foliis imbricatis et cristatis Dill. Muse. 140, t. 19. f. 26, 

 A, B, D. Lichenoides foliis pilosis crassioribus, obscure virentibus 

 Dill, in Ray, Syn. 74. 68. 



