Onosma arenaria subsp. arenaria

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 : 92

(a) Subsp. arenaria

(inch O. transrhymnensis Klokov ):

Upper surface of leaves densely puberulent; setae simple or some stellate with rays c. 0-1 mm; corolla 12-17 mm, c. 1j times as long as calyx. 2n = 20. Almost throughout the range o f the species.