Delphinium datum, 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 : 214

4. D. datum L. , Sp. Pl. 531 (1753).

Tubers absent. Stems 40- 200 cm, with patent or slightly deflexed hairs below, glabrous or with patent hairs above, usually pruinose. Petioles not sheathing at base, those of upper leaves shorter than lamina; lamina palmately lobed. All bracts usually shorter than flowers, the lower 0-5 divided. Perianth-segments (9—)13—19(—22) mm, deep or dirty blue, or bluish-violet, glabrous or with patent hairs on the outside. Carpels glabrous or more or less patent-pilose. Seeds winged at angles. Mountains o f C. Europe and Jugoslavia; N. & C. Russia. Au Cz G a He Ju Po Rm Rs (N, C, W).

A polymorphic species including 3 subspecies and many varieties in Europe.

1 Honey-leaves the same colour as the perianth, or the upper paler or yellowish (c) subsp. austriacum

1 Honey-leaves blackish or dark brown

2 Lower perianth-segments 1 |- 2 | times as long as wide, the lateral distinctly wider (a) subsp. elatum

2 Lower perianth-segments 2|-3 1 times as long as wide, the lateral little wider (b) subsp. helveticum