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 rocky alpine ledges, mountains, alpine pastures. The habit is ascending. The plant is related to P. verna, of which it may be a large form, with larger, less blunt leaflets, and larger flowers, sometimes spotted. The radical leaves are 5-lobed. The leaflets are inversely ovate, or wedge-shaped, deeply scalloped or toothed above the middle, the teeth unequal, 4 on each side, green below, hairy. The stipules are ovate. The flowers are several, yellow, with orange spots. The outer sepals are blunt, oblong, the inner twice as broad, ovate, acute. The achenes are smooth, hairless. The plant is 4-10 in. high, flowering from May to July, and is a herbaceous perennial.
The habitat of this plant is calcareous rocks. The habit is erect. The plant is hairy below. The stems are repeatedly forked, branched above. The leaves are pinnate. The radical leaves have 5 leaflets, and are stalked, unequal at the base, those on the stem are few, trifoliate, nearly stalk-less, and they are round or oblong or obliquely inversely ovate, wedge-shaped below, irregularly toothed or scalloped. The flowering shoots are annual. The flowers are white. The achenes are smooth, hairless. The plant is 1-2 ft. high, flowering in May and June, and is a herbaceous perennial.
■ The habitat of this plant is rocky banks by rivers, and calcareous rocky places. The plant has the undershrub habit. The plant is silky, much branched, leafy the bark flaking. The leaves are oblong, lance-shaped, with lobes each side of a common stalk. The leaflets are 5, oblong, lance-shaped, entire, with rolled-back margins. The stipules are entire. The flowers are large, golden-yellow, in terminal corymbose cymes. The bract-eoles are lance-shaped, longer than the egg-shaped calyx-segments. The plant is 2-4 ft. high, flowering in June and Jul)', and is a perennial shrub.
The habitat of this species is Scotch mountains, dry summits, andstony places. The habit is prostrate, then ascending. The plant is hairy and bluish-green. The root-stock is woody, flattened, the branches leafy above. The leaves are downy both sides, trifoliate, the leaflets are wedge-shaped, with 3 teeth at the blunt end, inversely egg-shaped. The flowering stems are in the axils, leafy, ascending. The flowers are orange-yellow, in a terminal close cyme. The petals are small, narrow or absent, lance-shaped. The calyx-segments are lance-shaped, acute. The bracteoles are linear. The pistils and stamens (4-10) are variable. The achenes are hairless. The plant is 2-6 in. high, flowering in July and August, and is a herbaceous perennial.