RAMAUNA.] RAMALIXEI. 193 



Form minutula Fr. fil. Lich. Scand. i. (1871) p. 37. Thallus 

 very small, csespitoso-erect, very much branched, non-sorediiferous, 

 somewhat shining. Apothecia never seen. Cromb. Grevillea, vii. 

 p. 141. Ramalina farinacea a. minutula Ach. Lich. Univ. (1810) 

 p. 606. Lichenoides segmentis anc/iistioribus, ad margines verrucosis et 

 pulvemlentis Dill. Muse. 172, t. 23. f. 63 A. 



Referred by Acharius and most authors to R. farinacea, this is rightly 

 placed by Fries fil. (I. c.) under the present species. Probably a young 

 and barren state. 



Hal). On pales, chiefly larch, in wooded upland districts. Distr. Local 

 in S. England, S., N.E., and N. Scotland ; no doubt often overlooked. 

 B. M. : New Forest, Hants. Swanston, near Edinburgh ; Park, near 

 Aberdeen ; Lairg, Sutherlandshire. 



6. R. polymorpha Ach. Lich. Univ. (1810) p. 600. Thallus 

 rigid, compressed, nervoso-unequal or longitudinally sublacunose, 

 moderate, subopaqtie, granuloso-sorediate, sublineari-laciniate, glau- 

 cous or greenish-white ; laciriiae plane, subsimple, often somewhat 

 broad (medulla K ). Apothecia marginal, concave, small, pale- 

 yellow or glaucescent, the receptacle rugoso-unequal or srnoothish ; 

 spores oblong, straight or substraight, 0,011-16 mm. long, 0,004-5 

 mm. thick. Cromb. Grevillea, xv. p. 47 ; Lich. Brit. p. 25 pro parte ; 

 Leight. Lich. Fl. ed. 3, p. 474 pro parte, et var. liyulata, ed. 3, p. 87 

 pro parte. Lichen polymorphus Ach. Prodr. (1798) p. 178. 



A variable species, of which ligulata Ach. (Meth. p. 265), Lich. Univ. 

 p. GOO, is the type. From all states of R. ctispidata, with which it 

 agrees in the reaction of the medulla, it is distinguished by the con- 

 colorous globuloso-granulo&e soredia, more or less scattered over the 

 thallus. It has not occurred with us fertile. 



Hab. On exposed rocks in maritime tracts. Distr. Local and scarce 

 on the N.E. coast of Scotland. B. M. : Near Portlethen, Kincardine- 

 shire. 



Var. ft. emplecta Ach. Lich. Univ. (1810) p. 601. Lacinige 

 attenuate, very much branched, acuminate, granulate. Apothecia 

 not seen. Cromb. Grevillea, xv. p. 47 ; Leight. Lich. Fl. ed. 2, 

 p. 475 pro parte, ed. 3, p. 87 pro parte. Parmelia polymorpha 

 . emplecta Ach. Meth. (1803) p. 267. 



Distinguished by the narrower and much branched laciniae, which are 

 also more erect, and somewhat rounded and acuminate at the apices. 

 The soredia are not crowded in our specimens, which are always sterile. 



Hab. On rocks and boulders in mountainous regions. Distr. Local 

 and scarce in the N. Grampians, Scotland. B. M. : Near Loch Callater, 

 Braemar, Aberdeenshire. 



Subsp. R. capitata Nyl. ex Cromb. Grevillea, vii. (1879) p. 141. 

 Thallus small, with the lacinise lineari -divided, branched, obtuse and 

 capitato-sorediate at the apices. Apothecia terminal or subterminal, 

 the receptacle beneath at length nervoso-rugose or costato-nervose ; 

 spores oblong, slightly curved or substraight. Ramalina puly- 



o 



