LEPTOGITTM.] COLLEMEI. 73 



Var. y. crenatum Nyl. Flora, 1875, p. 106. Thallus small, smooth 

 or subsmooth ; lobes short, crowded, somewhat crena to-incised at 

 the margins. Apothecia small, scattered. Cromb. Grevillea, xv. 

 p. 13. 



A marked variety, at once distinguished by the entirely smooth thallus, 

 only a few lobes here and there being slightly rugulose. Its small 

 crowded lobes suggest L. pulvinatum. In the only fertile specimen seen, 

 the apothecia are but few. 



Hab. On the ground among schistose rocks in swbalpine localities. 

 Distr. Extremely local and scarce among the S. Grampians of Scotland. 

 B. M. : Craig Vore and Ben Lawers, Perthshire. 



14. L. palmatum Mont. PI. Cell. (1840) p. 128, in Webb & Berth. 

 Canar. Thallus laciniate, thin, greenish- or glaucous-brown; lacinise 

 sublinear, suberect, corniculato-convolute. Apothecia small, sessile, 

 pale-red, the thalline margin elevated, entire, concolorous ; spores 

 ellipsoid or attenuate at the apices, variously septate and divided 

 (irregularly murali-locular), 0,028-40 mm. long, 0,016-18 mm. 

 thick. Nyl. Syn. i. p. 126; Mudd, Man. p. 48 ; Cromb. Lich. Brit, 

 p. 9; Leight. Lich. Fl. p. 34, ed. 3, p. 31. Collema palmatum Sm. 

 Eng. Fl. v. p. 210. Scytenium palmatum Gray, Nat. Arr. i. p. 398. 

 Lichen palmatus Huds. Fl. Angl. ed. 2 (1778), p. 536; With. Arr. 

 ed. 3, iv. p. 74 ; Eng. Bot. 1. 1635. Lichenoides pellucidum fuscum 

 corniculatum Dill. Muse. 143, t. 19. f. 30. Lichenoides gelatinosum 

 tenerius laciniatum ex fusco purpurascens Dill, in Hay, Syn. ed. 3, 

 72. 54. 



The thallus is csespitose, moderate or small, often tinged purplish, and 

 rather brittle when dry. It somewhat resembles var. 8 of the preceding 

 iu the herbarium, but is distinguished by its nearly erect Iacinia3, revo- 

 lute at the margins. The apothecia are rare, and are but few when 

 present. On the thallus is sometimes found the parasitic Obryzum cor- 

 nicttlatum. 



Sab. Among mosses and short grass in sandy and gravelly places in 

 maritime and upland tracts. Distr. General in the Channel Islands and 

 England, rare in Scotland and Ireland. B. M. : St. Brelade's Bay, 

 Island of Jersey ; Island of Herm. Yarmouth, Norfolk ; Hale End, 

 Epping Forest, Essex ; near Stony Cross, New Forest, Hants ; Swanage, 

 Dorsetshire ; Lustleigh Cleeve, Bottor Kock, and near Okehampton, 

 Devonshire; Hales End, near Malvern, Worcestershire; Coath am, Cleve- 

 land, Yorkshire. Sands of Barrie, Forfarshire ; Castleton of Braemar. 

 Aberdeenshire. Luggelaw, co. Wicklow. 



15. L. tremelloides Gray, Nat. Arr. i. (1821) p. 400. Thallus 

 lobed, thin, somewhat smooth, dull olive-green or glaucous leaden- 

 coloured ; lobes oblong, imbricate or crisp, entire at the margins. 

 Apothecia moderate, urceolate or plane, reddish or pale-red, the 

 margin thick, entire ; spores ovoid, or often ellipsoid, narrowed at 

 either apex, 3-septate, irregularly murali-locular, 0,021-27 mm. 

 long, 0,008-9 mm. thick. Nyl. Syn. i. p.. 124, t. ii. f . 7 ; Mudd, 

 Man. p. 48 ; Cromb. Lich. Brit. p. 8 ; Lc'ight. Lich. Fl. p. 28, 



