Onosma tinctoria, Bieb.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 91

10. O. tinctoria Bieb. , Beschr. Länd. Terek Casp. 136 (1800)

(inch O. polychroma Klokov ).

More or less caespitose biennial; stems 20-70 cm, several, erect, much-branched, puberulent and patent-setose, the setae 1 -3 mm. Lower leaves 30-150 x 3- 15 mm, oblong or oblong-spathulate, puberulent and setose above, the setae with conspicuous tubercle at base, puberulent beneath with setae on midrib and margin. Inflorescence muchbranched; pedicels 1-2 mm; bracts about equalling calyx. Calyx 6-11 mm in flower, 12-20 mm in fruit. Corolla 8-12 (-15) mm, pale yellow, often with purple tinge, glabrous or with the lobes puberulent, c. l j times as long as calyx. Nutlets 3-4 mm, smooth. S. part o f U.S.S.R., northwards to c. 53° N. Rs (C, W, K, E).