COLLEMA.] COLLEMEI. 47 



Hudson's specific name has priority, but as it might be confounded 

 with C cristatum Iloffui., I have not used it. Similarly C. muUiflorum 

 var. palmatum Ilepp, is rejected on account of the homonym Leptoyium 

 pahnafum (Huds.). — Brit. JE.cs. : Leiglit. n. 10(3. 



A well-marked variety, distinguished by the apothecia being sessile. 

 They are generally more numerous than in the type, sometimes becoming 

 large and proliferous, with the subentire or subgranulate margin ob- 

 literated. 



Jfab. On the ground and on walls in maritime and upland districts. — 

 iJistr. (Teneral in S., W., and N. England, N. Wales, the W. Highlands, 

 Scotland, and S.W. Ireland. — B. M. : Amberley, Sussex ; near Claver- 

 ton, Somerset ; near Malvern, Worcestershire ; near Shrewsbury, Shrop- 

 shire ; Barmouth, Merionethshire ; Island of Anglesea ; near Ayton, 

 Cleveland, Yorkshire. Campsie Glen, near Stirling; Appin, Argyleshire; 

 Killin, Perthshire : Lochaber, Inverness-shire. Blackstone Bridge, co. 

 Cork ; Dunkerron, co. Kerry. 



12. C. glaucescens Hoffm. Deutsch. Fl. ii. (1795) p.lOO.— Thallus 

 thin, ajipressed, lobed, sordid-greeo or dark-olive ; lobes small, round 

 or oblong, approximate or scattered, entire or slightly creniilate. 

 Apothecia moderate, appressed, plane, reddish-brown or red ; the 

 thalline margin thin, scarcely prominent, entire or slightly crenate ; 

 spores usually 4uae (6nae), ovoid, 5-septate, with several longitudinal 

 septules, 0,027-38 mm, long, 0,014^16 mm. thick. — Cromb. Gre- 

 villea, sv. (1866) p. 11. — CoUema limosum Ach., Borr. in Eng. 

 Bot. Suppl. t. 2704. f. 1 ; Sm. Eng. Fl. v. p. 208 ; Tayl. in Mack. 

 Fl. Hib. ii. p. 108; Cromb. Lich. Brit. p. 4; Leight. Lich. Fl. 

 p. 21, ed. 3, p. 19. CoUema puJposv.m y. limosum Mudd, 3Ian. 

 p. 39. 



This is readily recognized by the agglutinate and somewhat evanescent 

 thallus, and by the appressed, thinly and often indistinctly margined 

 apothecia. Its chief characteristic, however, is in the spores, which at 

 once distinguish it from states of the alhed species. The apothecia are 

 at first slightly concave, and when the lobes are scattered are single in 

 each fertile lobe. 



Hah. On moist clayey soil in maritime and upland tracts. — Distr. 

 Local and rare in S.W. and N. England, as also in the W. Highlands, 

 Scotland ; probably overlooked when the thallus is evanescent. —B. M. : 

 Near Southend, Essex ; Croham QuaiTy, Kent ; flurstpiei-point, Sussex ; 

 Wootton-imder-Edge, and near Cirencester, Gloucestershire ; Bulstrode, 

 Buckinghamshire ; Buxton, Derbyshire ; Hawford and Norton, Worces- 

 tershire ; Coatham Marshes, near Ayton, Cleveland, Yorkshire j Miln- 

 thoi-pe, Westmoreland. Fort Augustus, Inverness-shire. 



13. C. crispum Ach. Syu. (1814) p. 311.— Thallus lobato- 

 divided or subradiate, dark-green or brownish-black ; lobes some- 

 what erect, granulate and crowded in the centre, depressed and 

 dilated at the circumference, the larger granulato-crenate at the 

 margins (I -|- reddish). Apothecia moderate or somewhat large, 

 plane, reddish or dark-red, the margin erenato-granulate ; spores 

 ovoid, usually 3-septate, becoming irregularly murali-locular, 



