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 Saxifrage is alpine rocks. The plant has the cushion habit. The stems are tufted, creeping, prostrate then ascending. The leaves are opposite, small, blunt, thickened at the tip, overlapping in 4 rows, ovate, oblong, fringed with hairs, with stout bristles. The flowers are purple, terminal, bell-shaped, stalk-less. The sepals are fringed with hairs, united to the middle, blunt. The petals are inversely ovate. The capsule is free, with awl-like, spreading beaks. The plant is 4-8 in. high, flowering from April to June, and is a herbaceous perennial.
The habitat of this species is Highland Alps, mountain cliffs, etc. The habit is erect, and the plant is a rosette plant. The aerial stem is a scape. The rootstock is small. The plant is glandular, hairy on the leaf margins, scape, bracts, and ultimate flower-stalks. The leaves are radical, rather leathery, broadly spoon-shaped, scalloped, toothed, narrowed into the leaf-stalk. The bracts are linear. The flowers are white, in heads or cymes, densely-clustered. The sepals are united below, purplish, adnate to the base of the carpels, the calyx being half-inferior. The petals are not spotted, and are longer than the calyx. The beaks of the capsule are spreading. The plant is 3-6 in. high, flowering in July and August, and is a herbaceous perennial.
The habitat of this Saxifrage is alpine and subal-pine rills, damp rocks on mountains. The plant has the rosette habit, and the stems are tufted, but the aerial stems are scapes. The rootstock is branched and small. The plant is hairless, or has but few hairs. The leaves are rather succulent, fringed with hairs, entire, oblong, lance-shaped, wedge-shaped, toothed, narrow below, hardlv-stalked. The flowers are few, white, in a loose cyme or corymb. The scape bears no leaves. The sepals are lance-shaped. The petals are clawed, ovate, with two transverse yellow or purple spots below. The anthers and pistils are red. The anther-stalks are awl-like. These serve as honev-guides. The bracts are linear. The beaks of the capsule are slender, nearly erect. The plant is 2-8 in. high, flowering in July and August, and is a herbaceous perennial.
London Pride or St. Patrick's Cabbage (Saxifraga umbrosa, L.). - London Pride is an alien in Great Britain. The habit is the rosette habit. The barren shoots are prostrate below. The plant is hairless or loosely hairy. The leaves are rounded, inversely ovate, broad, narrowed into a stout leaf-stalk, coarsely scalloped or toothed, leathery. The leaf-stalk is glandular, flattened, broad. The crenatures are cartilaginous. The flowers are white or pink, in a panicle-like raceme. The flower-stalks are glandular. The scape is without leaves. The sepals are reddish. The anther-stalks are swollen above. The anthers are red. The beaks of the capsule are spreading. The plant is 6-12 in. high, flowering in June and Julv, and is a herbaceous perennial.