Phyteuma nigrum, F. W. Schmidt

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 96

5. P. nigrum F. W. Schmidt , FI. Воет. 2: 87 (1794).

Stem 20-60 cm, erect, glabrous, usually more or less leafless in upper third. Basal leaves 3-5 cm, present at anthesis, usually twice as long as wide, obtuse, cordate, crenate, very rarely serrate; middle and upper cauline leaves with greatly reduced lamina, narrowed at base, not crowded, more or less patent. Inflorescence at first ovoid, later cylindrical. Bracts linear, acute, about as long as the width of the spike, more or less conspicuous. Corolla blackishviolet, rarely blue or white, curved in bud. Stigmas 3, rarely 2. 2« = 22. Mountain meadows and woods. • From Belgium to E. Austria. Au Be Cz Ga Ge.