26 BHITISH HI£BACIA. 



dosely resembles the "manooephalous" form of S. mgreseens ; 

 from 'wHcli however it differs in having a less rigid stem, more 

 lanceolate root-leaves, more linear stem-leaves, broader and less 

 attenuated phyUaries, and livid or yellow (not fuliginous) styles. 



Fnder cultivation (unlike M. aVpinvm, which so far as I have 

 observed, never produces more than a solitary head), H. gracilentum, 

 branches at every axU. from the base upwards. This circumstance, 

 combined with the distinctive characters which mark it in a wild 

 state, lead me to regard it as a true species, though having, as 

 before shown, many points in common with both JT. alpinum and 

 .fl". nigrescens. 



On the Caimgorum moimtains where both S. alpimwm, and 

 S. gracilentum occur, the latter may be distinguished from the 

 former by its more slender and usually rather more elongated stem, 

 smaller heads and nearly glabrous florets. 



My specimens from Lochnagar and Canlochen Glen correspond 

 almost exactly with specimens from Norway, kindly famished me 

 by Professor Blytt of Christiania, as typical forms of the plant 

 figured as JT. alpinum at tab. 27 of the Flora Danica, and which is the 

 " ff. alpinum var. melanocephalum of Fries ; but not (apparently) 

 the H. mtlanocephalum of TamcJi, which has florets pUose externally, 

 and must be referred to H. alpinum. 



8. H, GLOBOSTJM. Glaucous or green. Stem one or few Jieadei, 

 floccose, slightly hairy. Eoot-leaves ovate or ovate-spathu- 

 late, sub-acute or obtuse, entire or dentate, glabrous above, 

 narrowed into petioles. £uds globose. Irmohieres rounded, 

 at the lase, ultimately spherical, dark with short black-based 

 hairs. Phyllaries nvmerous, Unear, attenuate, acute, op- 

 pressed. Florets siA-glabrous externally, glabrous or rather 

 pilose at the tips. Styles yelhw. 



Mountains of the Caimgorum range, at an elevation ef 2500 to 

 4200 feet. Eastern slope of Caimtoul in crevices of the granite 



