142 LICHEN ACEI. [CLADONIA. 



Cladonia gracilis var. cornnia Leight. Lich. Fl. p. G2, ed. 3, p, 58. 

 Lichen cornutus Linu. Sp. PL (1753) p. 1152. — This is not Lichen 

 cornutus of British authors : vide C. Jihida var. subcomuta and 

 C. macilenta. 



Though by some regarded as a variety or subspecies of C. gracilis, yet 

 fi'om the podetia being corticate only to beyond the middle and then more 

 or less pulverulent upwards, it may rank as a distinct species. The basal 

 leaflets are not unfiequently present ; and the podetia, which are 2-4 in. 

 high, are quite naked. In British specimens the apothecia and spermo- 

 gones are extremely rare. 



Hab. Among mosses on the ground on heaths and in woods in upland 

 tracts. — Distr. Seen oidy fi-om N. England and the Grampians, Scotland. 

 — B. M. : Ayton Moor, Cleveland, Yorkshire. SherriflFmuii-, near Stir- 

 ling; Rannoch and Killiecraukie, Perthshire ; Ballochbuie Forest,Braemar, 

 Aberdeenshire ; Euthiemurchus, luverness-shire. 



Form clavulus Fr. Lich. Eur. (1831) p. 225.— Podetia short, 

 somewhat turgid, corticate from below the middle ; scyphi none. 



A stunted, stouter form, with the podetia sometimes pulverulent 

 throughout, except towards the base. It apparently never occurs scyphi- 

 ferous or fertile. 



Sab. On turf-walls in upland districts. — Distr. Extremely local and 

 scarce among the Central and X. Grampians, Scotland. — B. M. : Rannoch, 

 Perthshire ; Glen Quoich, Braemar. 



13. C. ochrochlora Florke, Clad. (1821) p. 75. — Thallus foliaeeo- 

 squamulose at the base ; squamules laciniato-crenate, greenish above, 

 white beneath ; podetia somewhat short, cylindrical, glabrous in the 

 lower portion and pale greenish-grey, pulverulent above and whitish 

 or ochroleucous, obtuse and truncate at the apices or narrowly 

 scyphiferous, with the margins dentato-radiate (K — , CaCl— ). 

 Apothecia small, pale brown. — Cromb. Grevillea, si. p. 112. — Cla- 

 donia gracilis var. ochrochlora Leight. Lich. Fl. p. 63, ed. 3, p. 59. 

 C. pyxidata t. ochrochlora Mudd, Brit. Clad. p. 14. — Brit. Exs. : 

 Mudd, Clad. 24-26. 



This approaches in some respects subsp. C. fibula, and in others 

 C cormda ; but as it constantly preserves its own type, it may be regarded 

 as distinct. The podetia are occasionally sparingly squamulose ( var. phyl- 

 lostrota Florke), and the scyphi are rarely proliferous. In this country 

 it seldom occurs fertile, though the spennogoues are not uncommon. 



Hab. On putrid trunks and turfy soil in wooded upland districts. — 

 Distr. Somewhat local and rare in S.W. and N. England, in S. Scotland, 

 and in the W. Highlands. — B. M. : Near Beckey Falls, S. Devon ; near 

 Bodmin, Cornwall ; Malvern, Worcestershire ; Dolgelly, Merionethshire ; 

 Cleveland, Yorkshire ; "Windermere, Westmoreland. New Galloway, 

 Kirkcudbrightshire ; Barcaldine, Argyleshire ; Loch Katrine, Perthshire ; 

 S. of Fort William, Inverness-shire. 



Form ceratodes Florke, Clad. (1821) p. 77. — Podetia slender, 

 cylindrical or somewhat ventricose, simple, subulate at the apices. — 



