28 BRITISH HIEIU.CIA. 



from its nearest ally (H. graeilentumj in having broadly ovate, shortly 

 stalked root-leaves, few small stem-leaves, involucres globose before 

 and after flowering, and narrow, linear, attenuate, acute phyUaries. 

 When the root-leaves are entire or denticulate, they are usually 

 narrowed gradually into more or less elongated petioles ; but when 

 suddenly narrowed or rounded towards the base, the petioles are 

 generally slender and very short (J an inch) : the latter must be 

 regarded as the typical form. Under cultivation, H. gldbosum retains 

 its distinctive characters, and branches from the base upwards. The 

 occasionally glabrous florets of this plant seem to indicate an alliance 

 with the continental group which includes H. glanMiferum, H. 

 piliferum, H. glahratum, &o. though the more or less numerous 

 hairs usually present, do not permit of its being attached to that 

 section, which is characterized by having perfectly glabrous florets. 



9. H. NIGRESCEITS. Green. Stem simple or branched, with 

 one or few heads,* fioccose. Eoot-leaves ovate or lanceolate, 

 coarseh/ and irregularly dentate, slightly hairy or sub-glabrous 

 above, with slender petioles. Stem-leaves few, lanceolate 

 or oblong, shortly stalked. Involucres ovate at the base, 

 dark green, villous with soft black-based hairs. PhyUaries 

 broad, aeuminate; outer ones ohtuse; flocoose at the points. 

 Florets glabrous externally, shortly pilose at the tips. Styles 

 fuliginous. 



H. nigrescent. "Willd. Sp.Pl. vol. iii. p. 1574. Fries, Symb. 

 p. 104. Bab. Han. Ed. 3, p. 195. 

 H. pulmonarmi E. B. t. 2307. 



Highland mountains at an elevation of 2000 to 3000 feet ; not 

 uncommon. Micaoeous cliffs of the Corrie of Clova, Craig "Wharral 



> See pre&ce, page vii. 



