Saxifraga cernua, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 377

92. S. cernua L. , Sp. Pl. 403 (1753) .

Basal leaves 15-25 mm wide, reniform, 5- to 7-lobed, subglabrous, with long petiole; cauline leaves numerous, similar , but with progressively shorter petioles and fewer, deeper and more acute lobes; all with reddish bulbils in their axils. Stem up to 30 cm but often much less, usually simple, with a solitary, terminal flower (very rarely several flowers, one on each branch), which is, however, often abortive. Petals in well-developed flowers 8-12 mm, white, glabrous; ovary superior or very slightly immersed in receptacle. Seeds unknown, reproduction being entirely by bulbils. 2« = 50, 64. Arctic and subarctic Europe, southwards to c. 57° N. in Scotland and Ural; Alps; Carpathians. Au Br Cz Fe He Is It N o Po Rm Rs (N, C) SbSu. S. x opdalensis Blytt, Christ. Vidensk.-Sels. Forh. 1892: 52 (1892) ( S. cernua x rivularis ) is frequent in one district of Norway, near Opdal, apparently dispersed by bulbils from a single original cross. It is stouter than either of the parent species; it resembles S. cernua in having bulbils in the axils of the cauline leaves, but they are greenish, the petals are smaller (6 mm), and the ovary more deeply immersed in the receptacle. (A) Evergreen perennials, perennating by epigeal stolons or sterile, leafy shoots; leaves opposite, sessile, undivided, with marginal hydathodes, often lime-encrusted; ovary semi-inferior.