Lithospermum 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 : 86

4. Lithospermum L. 2

Perennial herbs. Flowers in terminal and axillary, leafy cymes, sometimes heterostylous. Calyx 5-lobed more or less to the base, accrescent. Corolla cylindrical to infundibuliform, whitish; tube with 5 more or less glandular invaginations in the throat and with an annulus at the base. Stamens included, inserted at about the middle of the throat. Style included, simple; stigma 2-lobed. Nutlets 4, detaching completely from the receptacle, smooth, white and shining.