Biscutella frutescens, Cosson

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 : 327

9. B. frutescens Cosson , Not. Pl. Crit. 27 (1849)

(B. ‘sujfrutescens' Willk., sphalm.). Rhizome black, woody; whole plant covered with dense, white tomentum; stems simple or branched, up to 50 cm. Basal leaves 6 x 20 cm, ovate and sinuatedentate or lyrate; cauline leaves sessile or amplexicaul, the lower resembling the basal leaves. Inflorescence much-branched. Sepals 2 mm; petals 4 mm. Silicula 3-5-4x 7 mm, with oblique valves, the margin continuous, with small swellings. S. W. Spain; Islas Baléares. BI Hs.

B. incana Ten. , Fl. Neap. Prodr. app. 5, 19 (1826) from S. Italy, which appears to be like 9, but with leaves oblong, regularly sinuate-dentate, with obtuse teeth, densely white-strigose, and silicula glabrous, with the margin subundulate, has been seldom collected; its status is not known.