Bupleurum longifolium, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 346

3. B. longifolium L. , Sp. Pl. 237 (1753) .

Stout, erect, yellow- or purple-tinged perennial 30-150 cm. Lower leaves elliptic- spathulate, subobtuse, mucronate; petiole longer than or equalling lamina, broadly winged, sheathing at base; cauline leaves ovate- to suborbicular-cordate. Rays 5-12. Bracts 2-4, ovate to suborbicular, obtuse or shortly acuminate; bracteoles 5-8, like the bracts but smaller, usually shortly connate, but sometimes up to half-way; veins conspicuous. Fruit 4-5-5 mm, elliptic-oblong, dark brown or black; ridges very prominent. C. Europe, extending to C. France, N. Bulgaria and E. Russia. Al Au Bu Cz Ga Ge He Hu Ju Po Rm Rs (N, C, W, K, E).