146 LICUENACEI. [CLADOSIA. 



18. C. degenerans Flurke, Clad. (1828) p. 41.— Thallus sqna- 

 mulose at the base; yquamules few, small, crenato-incised, glaucous- 

 green above, -svbite beneath ; podetia moderate, glabrous, often sub- 

 verrucoso-unequal, scyphiferous, whitish or pale-greenish, black and 

 uhitish-puuctate at the base ; scyphi often radiato-pedicellate or 

 proliferous at the margins (K — , CaCl— ). Apothecia somewhat 

 large, brown, or pale reddish -brown ; spores 0,010-11 mm. long, 

 0,0035 mm. thick. — Cromb. Lich. Brit. p. 19 ; Leight. Lich. Fl. 

 p. 64, ed. 3, p. 59. — Cladonia degenerans b. euphorea Mudd, Brit. 

 Clad. p. 17. Cladonia r/racilis ?. degenerans Mudd, Man. p. 55. 

 Capitidaria degenerans Florke in Web. et Mohr, Beitr. ii. (1810) 

 p. 308. 



A very variable plant, which approaches in its varieties and forma 

 several other species. In general it may readUy be distinguished fi-om all 

 of these, with which it might be confounded, by having the pudetia, 

 Avhich in age become blackish in their lower portion, whitish corticali- 

 punctate at the base. Its most typical state, as observed by Nylander 

 (Lich. Seand. p. 54), is form euphorea Ach. (Sto. p. 259), which has 

 almost the habit of C. yracUis and presents the above characters. The 

 only British specimen as yet seen is sterile. 



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

 Distr. Found only very sparingly among the N. Grampians, Scotland. — 

 B. M. : Head of Glen Gairn, Braemar, Aberdeenshire. 



Form l.haplotea Florke, Clad. (1828) p. 42. — Podetia moderate, 

 usually proliferously divided above, scyphiferous, scarcely or rarely 

 squamulose ; scyphi cristato-divided at the margins. — Mudd, Brit. 

 Clad. p. 18 ; Cromb. Lich. Brit. p. 19. — Cladonia gracilis I. dege- 

 nerans a. haplotea Mudd, Man. p. 55. Cenomyce gonorega a. aplotea 

 Ach. Syn. (1814) p. 258. 



The podetia in this form are from 1 to 2 in. high, naked, or occa- 

 sionallv, especially at the margins of the scyphi, sparingly squamulose. 

 In the' few British specimens, the apothecia, which are minute, reddish- 

 brown, are only sparingly present. 



Hab. On the ground in subalpine and alpine regions. ^ — Distr. Appa- 

 rently local and scarce among the Scottish Grampians.- — B. M. : Pass of 

 Leny, Perthshire ; Beu-uaboord and Upper Glen Dee, Braemar, Aber- 

 deenshire. 



Form 2. granulifera Cromb. Grevillea, xi. (1883) p. 113. — 

 Podetia moderate, densely verrucoso-granulose, simple, or shortly 

 branched above, obscurely scyphiferous. 



Seems to be intermediate between the type and the follo%ving variety, 

 and is well characterized by the micute crowded granules vrlxh which 

 the blackish podetia are clothed throughout. The apothecia in the only 

 specimen seen are somewhat large and dark-brown, but are visible only 

 on a s'.ngle podetium. 



Ildh. On the ground in alpine situations. — Distr. Met with only once 

 and very sparingly among the X. Scottish Grampians. — B. M. : Caiin- 

 gorm, Braemar, Abcrdoenshire. 



