50 BRITISH HIERACIA. 



obtuse, with scattered brittle whitish hairs, stellate down at the 

 margins, and a few setse ; inner ones sub-acute, sometimes obtuse, 

 with pale margins. Florets bright yellow. Sin/les always pure 

 yellow. 



A strongly marked species, diffeiing from its allies H. pallidum 

 and S. laaiophyUum, in its brittle fistulose stem, elongated rigid 

 pednncles, and in its nearly glabrous entire or denticulate leaves. 



On elevated cUffs H. arfenteum has simple stems and 1 to 3 heads, 

 but in lower and less exposed situations it branches freely and has 

 several heads. Under cultivation it branches from the base upwards. 



19. H. NiTIDTJM. I>ark grem. Stem with one leaf or leafless, 

 and with few heads, glabrous. Soot-leaves lanceolate, 

 acute, sh«/rply dentate or almost runoinate, glabrous above, 

 slightly hairy beneath and at the margins, narrowed into 

 petioles. Peduncles, scaly, rigid. Involucres ventricose, 

 with black-based hairs and setse. Fhyllaries acuminate 

 or sub-obtuse. Florets sub-pUose at the tips. Styles 



yellow. 



Eocky margins of alpine streamlets at an elevation of 1500. to 

 2500 feet : rare. On granite. Sides of the stream issuing from 

 the Corrie of Ben-na-bourd, and eastern side of Caimtoid, Aberdeen- 

 shire. 



Mowers in 7th and 8th months. 



Plant 15 to 24 inches high, with medium sized or rather large 

 heads. Boot slender, woody at the neck, with few fibres. Stem 

 rigid, wiry, glabrous or with a few scattered hairs in the lower 

 part; with 1 leaf, usually near the base; simple and sub- 

 corymbose at the top with few (2 to 5) heads, or (rarely?) 



