Buglossoides purpurocaerulea, (L.) I. M. Johnston

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 : 87

1. B. purpurocaerulea (L.) I. M. Johnston , Jour. Arnold Arb. 35: 44 (1954)

( Lithospermum purpurocaeruleum L. ).

Perennial; flowering stems 15-60(-70) cm, arising from a rhizome, erect, unbranched, with appressed hairs below and more patent hairs above. Leaves 3-5-8 x 0-7-1-5 cm, lanceolate to narrowly elliptical, very acute. Cymes 2-3. Calyx 6-8-5 mm; lobes linear, acute, setose. Corolla (12-) 14-19 mm, at first reddish-purple, then bright blue. Filaments inserted 5-8 mm above the base of the corolla-tube. Style 6-5-9 mm. Nutlets 3-5-5 x 3-3-5 mm, ovoid-globose, convex dorsally, obtusely keeled ventrally, white, smooth, shining. 2zz=16. Scrub and wood-margins. S. & C. Europe, extending to Britain and S.C. Russia. Al Au Be Br Bu?Co Cz Ga Ge G r He Hs Hu It Ju Po Rm Rs (C, W, K, E) Sa Si Tu.