58 



COLLEMACET. L^OLI-EMODirM. 



browuish-green. Apothecia biatorine, small, gyalectiform, brown 

 or reddish, the margin thickish, entire ; spores ovoid, 3— 1-septatc 

 and sparingly longitudinally divided, 0,025-30 mm. long, 0011-12 

 mm. thick. — CoUema hiatorinum Xyl. Act. Linn. Soc. Bord. ser. 3, 

 i. (1857) p. 268 ; Carroll, Journ. Bot. 1866, p. 22 ; Cromb. Lich. 

 Brit. p. 5, Journ. Bot. 1874, p. 335 ; Leight. Lich. Fl. p. 21, ed. 3, 

 p. 2o.—Bnt. Exs. : Larb. Lich. Hb. n. 282. 



Closely resembles Leptogium pusillum, from which it differs chiefly in 

 sti'ucture and the purely biatorine apothecia. Internally the thallu.=5 

 presents scattered cavities, each coutainiug 1 or 2 goniiuic granides, 

 ■with traces of tubiform canals. The apothecia are scattered, or more 

 or less crowded. 



Hob. On cretaceous soil and the mortar of old walls in damp places in 

 maritime and upland tracts. — Distr. The Channel Islands, S. and W. 

 England, plentiful where it occurs. — 15. M. : Coast of the island of 

 Alderney. Near Maidstone, Kent; near Lewes, Su.ssex ; Reigate hill, 

 Sun-ey ; Wadebridge, Cornwall ; near Cirencester, Gloucestershire ; 

 Chamwood Forest, Leicestershire. 



2. C. microphyllum Nyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxx. 

 (1883) p. 337. — Thallus effuse, microphylline, imbricato-lobcd, 

 often verrucoso-diffract, dark-green or olive-brown ; lobes minute, 

 ascending, granulato-crenate, somewhat dilated at the circumference. 

 Apothecia small, crowded, urceolato-concave, reddish-brown, the 

 thalline margin entire, tumid, subconcolorous ; spores ovoideo- 

 ellipsoid, usually 3-septate, becoming murali-locular, 0,016-24 mm. 

 long, 0,008-0,010 mm. thick. — Cromb. GreviUea, sv, p. 12. — 

 Leptogium microphnUum Xyl., Cromb. Journ. Bot. 1874, p. 330. 

 Collema microphyUnm Act. Lich. Univ. (1810) p. 630 : Borr. Eng. 

 Bot. Suppl. t. 2721 ; Sm. Eng. Fl. v. p. 2u8 : Mudd, :Man. p. 41 ; 

 Cromb. Lich. Brit. p. 6 : Leight. Lich. Fl. p. 22. Eiicliylmm mi- 

 croplufUum Gray, Xat. Arr. i. p. 396. Lfptor/ium fragrans Cromb. 

 Lich. Brit. p. 8 pro parte ; Leight. Lich. Fl. p. 30 pro parte, ed. 3, 

 p. 30. ColUma frag rans Sm. Eng. Fl. v. p. 208. Enclvjllum fragraas 

 Grav, Xat. Arr. i. p. 396. Lich'n fnigram Eng. Bot. t. 1912. — 

 Brit. Exs. : Leight. n. 258 : Larb. Lich. Hb. n. 2. 



According to Nylander in litt. the goniraia are partly moniliform and 

 partly without order, with interwoven hlamentose elements. From 

 Sowerby's original specimen it appears that Lichen frcujrans E. B. is 

 merely a state of this, and the fragrance from which it obtained its trivial 

 name was, as observed by Borrer, accidental. The apothecia are minute, 

 numerous and crowded. 



Hah. On the trunks of old trees, chiefly Ash and Elm in shady upland 

 situations. — Distr. In the Channel Islands, S.W. and N. England ; not 

 yet known from Scotland or Ireland. — B. M. : St. Brelade's Bay, Island 

 of Jersey. Xear Bury, Suffolk ; Copthall, Essex ; South wick, near Lewes, 

 and Henfield, Sussex : Lyndhurst, Xew Forest, Hants ; Wimpole Park, 

 Cambridgeshire ; Claines, Wurcestershire ; near Oswestry, Shropshire ; 

 (Tarn, Denbighshire ; Ingleby Park, Cleveland, Yorkshire : Leven's Park, 

 Kendal, Westmoreland. 



