58 COLLEMACEI. [COLLEMODIUM. 
brownish-green. Apothecia biatorine, small, gyalectiform, brown 
or reddish, the margin thickish, entire ; spores ovoid, 3—-4-septate 
and sparingly longitudinally divided, 0,025-30 mm. long, 0011-12 
mm. thick.—Collema biatorinum Nyl. Act. Linn. Soc. Bord. sér. 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. 25.—Brit. Hvs.: Larb. Lich. Hb. n. 282. 
Closely resembles Leptogium pusillum, from which it differs chiefly in 
structure and the purely biatorine apothecia. Internally the thallus 
presents scattered cavities, each containing 1 or 2 gonimic granules, 
with traces of tubiform canals. The apothecia are scattered, or more 
or less crowded. 
Hab. 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.—B. M.: Coast of the island of 
Alderney. Near Maidstone, Kent; near Lewes, Sussex; Reigate hill, 
Surrey; Wadebridge, Cornwall; near Cirencester, Gloucestershire ; 
Charnwood Forest, Leicestershire. 
2. C. microphyllum Nyl. ev Lamy, Bull. Soc. Bot. Fr. t. xxx. 
(1883) p. 337.—Thallus effuse, microphylline, imbricato-lobed, 
often verrucoso-diffract, dark-green or olive-brown ; lobes minute, 
ascending, granulato-crenate, somewhat dilated at the circumference. 
Apothecia small, crowded, urcecolato-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. Grevillea, xv. p. 12.— 
Leptogium microphyllum Nyl., Cromb. Journ. Bot. 1874, p. 330. 
Collema microphyllum Ach. Lich. Univ. (1810) p. 630; Borr. Eng. 
Bot. Suppl. t. 2721; Sm. Eng. Fl. v. p. 208; Mudd, Man. p. 41; 
Cromb. Lich. Brit. p. 6; Leight. Lich. Fl. p. 22. Enchylium mi- 
crophyllum Gray, Nat. Arr. i. p. 396. Leptogium fragrans Cromb. 
Lich. Brit. p. 8 pro parte ; Leight. Lich. Fl. p. 30 pro parte, ed. 3, 
p- 30. Collema fragrans Sm, Eng. Fl. v. p. 208. Enchylium fraqrans 
Gray, Nat. Arr. i. p. 396. Lichen fragrans Eng. Bot. t. 1912.— 
Brit. Exs.: Leight. n. 258; Larb. Lich. Hb. n. 2. 
\ 
According to Nylander zm ditt. the gonimia are partly moniliform and 
artly without order, with interwoven filamentose elements. From 
Sowerby’s original specimen it appears that Lichen fragrans KE. 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. 
Hab. 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. Near Bury, Suffolk; Copthall, Essex ; Southwick, near Lewes, 
and Henfield, Sussex ; Lyndhurst, New Forest, Hants; Wimpole Park, 
Cambridgeshire; Claines, Worcestershire; near Oswestry, Shropshire; 
Garn, Denbighshire ; Ingleby Park, Cleveland, Yorkshire ; Leven’s Park, 
Kendal, Westmoreland. 
