Iberis strida subsp. stricta

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 325

(a) Subsp. stricta :

Basal leaves shallowly toothed. Silicula ovate, winged from about the middle, the lobes acuminate, half as long as the style. France (Hautes-Alpes).