BRITISH HIERACIA. 55 



especially on magnesian, oolite, and mountain limestone : ascend- 

 ing to an elevation of 2500 to 3000 feet. 



ft rotundatum : rare. Canlocten Glen, PorfarsMre. 



Plowers in 6th, 7th and 8th months. 



Plant 1 to 2 feet high, with rather small heads. Booi des- 

 cending, with few fibres. Siem erect, easily compressed, with 

 scattered brittle white hairs and stellate down (especially in the 

 upper part) or snb-glabrous ; usually with 1 leaf but sometimes 

 leafless or (more rarely) with 2 or 3 leaves ; more or less corym- 

 bose at the top with numerous (5 to 12 or 15) heads. Leaves 

 thin, light green. Eoot-leaves ovate, obtuse or rather acuminate, 

 apiculate, denticulate or irregularly and sharply dentate (espe- 

 cially at the rounded or cordate base, where there are frequently 

 long, sharp, deflected or spreading teeth) ; with scattered soft hairs 

 on both sides and at the margins, or sub-glabrous above ; destitute 

 of stellate down; with long villous petioles. Stem-leaf ovate 

 acuminate ; when large distinctly stalked, frequently incised at 

 the base which is usually rounded or cordate. Peduncles rather 

 short, spreading and more or less arcuate ; floccose and setose ; 

 frequently with scaly bracts at the base. Buds cylindrical. 

 Involucres dull green, rather ventricose, with black -based hairs, 

 more or less stellate down, and (in the alpine form) densely 

 clothed with black gland-tipped setse. Outer phyllaries rather 

 acute ; inner ones acuminate ; few innermost occasionally attenuate 

 and sub-obtuse ; frequently floccose at the margins and points 

 especially in the alpine form. Florets bright yellow. Styles 

 more or less livid, rarely pale (almost creamy) yellow. 



Though in some instances closely resembling forms of its near 

 ally H. ctssium when in a wild state, especially when growing at a 

 great elevation, yet under cultivation H. mwrorum assumes a widely 

 different appearance ; producing a more leafy stem, thinner, pale or 

 yeUowish-green root-leaves, distinctly stalked lower stem-leaves, and 

 a corymbose panicle of smaller but much more numerous heads on 

 more or less arcuate peduncles. 



