This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
The habitat of this plant is mountain streams, rocky margins of alpine streamlets. The plant is dark-green. The stem is nearly hairless, or with few hairs, woolly-felted, glandular above. The radical leaves are dark-green, firm, smooth, shining (hence nitidum), the outer egg-shaped, oval, oblong, blunt, the inner lance-shaped, acute, narrowed to the stalk, coarsely-sharply-toothed below, the innermost narrow, lance-shaped, toothed, stiffly hairy below and on the margin. The stem-leaf, 1 or none, is narrow with a long point, toothed. The panicle is falsely forked, in a corymb. The lower branches are straight, the upper curved, divided, or single-headed. The 5-7 heads are egg-shaped, blunt below. The dark phyllaries are blunt, linear-lance-shaped, narrow below, the inner long, narrow, woolly-felted, the tips smooth, hairy, glandular. The tips of the ligules are smooth, the inner stiffly hairy in bud. The styles are yellow. The plant is 15-24 in. in height, and flowers in July and August, being a herbaceous perennial.
Hieracium carenorum, F. J. Hanb. - The habitat of this plant is lofty mountains. The stem is slightly woolly-felted and stiffly hairy, glandular above. The radical leaves are pale-green, the basal 6-8. The outermost are oval, rounded, wedge-shaped below, the inner oval, egg-shaped, lance-shaped, acute, with acute, ascending, marginal teeth, stiffly hairy below and on the border. The stem-leaf is narrow, lance-shaped, acute, toothed, stalkless, smooth above, woolly-felted below on the border and mid-rib, fringed with hairs. The panicle is forked and corymbose. The flower-stalks are woolly-felted, stiffly hairy, glandular. The 3-7 heads are dark-green, egg-shaped. The phyllaries are dark-green, the outer small, linear, blunt, closely pressed, the inner lance-shaped, narrow, paler with transparent borders, hairy, glandular. The ligules are stiffly hairy, the tips hairless. The styles are yellow. The plant is 10-12 in. high, flowering in June and August, and is a herbaceous perennial.
Hieracium argenteum, Fr - The habitat of this plant is mountain districts, rocky places. The stem is simple or branched, bluish-green, smooth below, with woolly-felted glands above. The radical leaves are the same colour, or leaden, pale bluish-green below. The outer are spoon-shaped, inversely egg-shaped, the inner strap-shaped, elliptic, lanceolate, narrowed at both ends, acute, toothed, hairy, on long stalks. The 1-3 stem-leaves are small, narrow, lance-shaped. The panicle is a loose corymb. The stalks are long, straight, woolly-felted, glandular. The short heads are thick. The phyllaries extend forwards, and are dark, the inner paler below, the outer blunt, the inner acute, woolly-felted, stiffly hairy, glandular. The tips of the ligules are smooth. The styles are pure yellow.
The habitat of this plant is mountains, granite hills. The stem is slender, erect, simple or branched, smooth, or stiffly hairy below, glandular above. The radical leavesare horizontal, bluish-green, purple-blotched, the outer small, oblong, egg-shaped, narrowed to the foot-stalk, the inner egg-shaped, lance-shaped, acute, with fine teeth, stiffly hairy, woolly-felted below. The stem-leaf is bract-like, or if present lance-shaped, low down. The panicle is a loose, simple, or falsely-forked corymb, with arching divided branches. The 2-4 heads are blunt and cylindric in bud. The flower-stalks are woolly-felted, hairy, glandular. The phyllaries are oblong, linear below, lance-shaped, acute, the inner narrowed, longer than the ligules in bud, the tips bent back, woolly-felted, stiffy hair)', with small glands. The tips of the ligules are fringed with short hairs. The styles are yellow. The plant is 8-12 in. high, flowering in July and August, and is a herbaceous perennial.