Syn.: C. cornutoradiata (Vain.) Zopf

On sandy or mineral soil, mainly in open and ruderal situations, abundant in disused quarries, also found on industrial soil contaminated with heavy metals (Pb and Zn).

Belgium: Mar.: RRR, Fl.: RR, Camp.: AR, Brab.: RR, Mosan: AR, Ard.: AR, Lorr.: R.

Luxembourg: Ard.: AR, Lorr.: AR.

France: Mar.: RR, Lorr.: RRR.

Lit.: Boul.: 68, La69: 141, NL84: 13, Mü1: 147.