170 LICHENACEI. [CLVDINA. 



Eorm 1. tenuis Lamj-, Bull. Soc. Bot. Fr. t. xxv. (1878) p. 358. 

 — Podetia somewhat short, very slender, much and intricately 

 branched. — Cromb. Grevillea, xii. p. 92. — Brit.Exs.: Mudd, Clad. 

 n, 58 (vix). 



lias very much the aspect of Cladonia jmnffi'yis, from which, as well 

 as from an analogous form {tenuis Floerke) of C. ranyiferina, not yet 

 detected in Britain, it differs in the absence of any reaction with K. It 

 is from 1 to 1^ iu. high, and with us occurs oul}' sterile. 



Hnh. On the ground in upland biluations. — Distr. Seen only from a 

 few localities in S. and N. England, and S. and Central Scotland. — 

 B. M. : Epping Forest, Essex ; New Forest, Hants ; Kildale Moor, Cleve- 

 land, Yorkshire (atypical). Near Castle Douglas, Kirkcudbrightshire ; 

 Eannoch, Perthsbire ; Sidlaw Hills, Forfarshire ; Glen Nevis, Invernejs- 

 shire. 



Form 2. lacerata Nyl. e.v Norrl. Medd. Soc. pro F. et Fl. Fenn. 

 (1876) p. 14. — Podetia moderate, very shortly branched, perforate 

 or lacerate at the axils. — Cromb. Grevillea, xi. p. 115. — Cenomyce 

 sylvatica g. lacerata Del. iu Dub. Bot. Gall. ii. (1830) p. 621. 



The lacerate axils of the rather stouter and shortly branched podetia 

 distinguish this form. The apothecia are rare. 



Hah. In moist sandy places and on moorlands in maritime and upland 

 districts. — Distr. Local and scarce in the Channel Islands, S.W. England, 

 S. Scotland, and the Central and N.E. Cirampians. — B. M. : Quenvais, 

 Island of Jersey. Near Bodmin, Cornwall. New Galloway, Kirkcud- 

 brightshire; Moor of Rannoch, Perthshke ; Hills at Nigg, Kincardine- 

 shire. 



Yar. ft. grandis Cromb. Grevillea, xii. (1884) p. 92. — Podetia 

 robust, inflato-cylindrical, flcxuose, much branched, pale straw- 

 coloured, the branches short, somewhat drooping and brownish at 

 the apices. — Cladonia ranr/iferina var. grandis Florke, Clad. (1828) 

 p. 169 ; Mudd, Brit. Clad. p. 2b.— Brit. Exs. : Mudd, Clad. n. 60. 



Well distinguished by the much stouter podetia with their shorter 

 branches. Although regarded by some authors as a distinct species s. n. 

 Clndonia arbuscida ^Yallr., it holds only a somewhat analogous relation 

 to the type as forma gigantea does to the preceding species. It varies in 

 length from 3 to 5 in., and occasionally has the podetia very robust and 

 less branched. The few British specimens are only sparingly feilile. 



Hah. On the ground in elevated moorlands in mountainous regions. — 

 Distr. Spai-ingly in N. England, S. Scotland, and among the Gram- 

 pians. — B. 31. : Ayton Moor, Cleveland, Y^orkshire. Barend Moss, New 

 ({alloway, Kirkcudbrightshire ; Sidlaw Hills, Forfarshire ; Rannoch 

 Moor, Perthshire ; Glen Dee, Braemar, Aberdeenshire. 



Form portentosa Lcight. Ann. Mag. Nat. Hist. ser. 3, xviii. 

 (1866) p. 419. — Podetia very thick, difform, lacerate, verruculoso- 

 scabrid, very shortly branched, the branches turgid and denticulate- 

 cristate at the apices. — Cromb. Lich. Brit. p. 22, Grevillea, xi. 

 p. 115. — Cladina sylvatica iovm. portentosa Leight. Lich. Fl. p. 73, 



