Cynoglossum officinale, L.

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 : 119-120

1. C. officinale L. , Sp. Pl. 134 (1753) .

Biennial. Stems (20-)30-60(-90) cm, hirsute. Cauline leaves oblong to lanceolate, the lower shortly petiolate, the middle (10-)16-25(-30) mm wide, sessile to amplexicaul, shortly and softly hairy on both surfaces. Cymes ebracteate (rarely bracteate at base). Calyx-lobes up to 4 mm,ovate,hirsute. Corolla 5-6 mm,dull purple;tube cylindrical; limb shorter than tube. Stamens inserted in upper part of tube. Nutlets 5-8 mm in diameter, ovoid, with a distinct border; external face densely glochidiate. 2/7 = 24, 48. Dry open habitats. Most of Europe except the extreme north and the extreme south. Al Au Be Br Bu Co Cz Da Fe Ga Ge Gr Hb He Ho Hs Hu It Ju No Po Rm Rs (B, C, W, K, E) Sa Su.

Plants with bright reddish corolla 12-15 mm in diameter and with very short tube, occurring in W. Bulgaria, have been called C. rotatimi Velen. , Sitz.-Ber. Böhm. Ges. Wiss. (Math.-Nat. Kl.) 1893(37): 48 (1894); their taxonomic status is uncertain.