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, dry places, sandy shores. The habit is prostrate, then ascending, the stem geniculate. The rootstock is stout and blunt. The plant is hairy, with scattered, spreading, horizontal hairs. The leaves are nearly round, 5-7 lobed, the lobes divided into 3 nearly to the base, narrow, linear to oblong, lance-shaped, blunt or more or less acute. The leaves are vertical in sunlight. The stipules are egg-shaped, acute. The flowers are solitary, large, crimson or pink (hence sanguineum). The petals are long, inversely heart-shaped, with bearded claws. The sepals are spreading, oblong, blunt, awned. The flower-stalks are long. The carpels are smooth, crowned with few bristles. The seeds are dotted, wrinkled. The anther-stalks are swollen below. The plant is 1-2 ft. high, flowering in July and August, and is a herbaceous perennial.
The habitat of this plant is bare places near the coast, sandy and gravelly. The habit is prostrate. The stem is slightly hairy, the hairs soft and glandular. The leaves are simple, egg-shaped, oblong or heart-shaped, shortly-stalked, lobed, not cut deeply into segments, scalloped. The stipules are egg-shaped. The flowers are pale-pink, sometimes apetalous, or with very small petals, 1-2 on each stalk. The carpels are hairy, with a transverse straight, deep furrow below the deep semicircular pit near the apex. The anther-stalks are entire. The plant is 4-18 in. long, flowering between May and September, and is a herbaceous biennial or perennial.