Syn.: C. alcicornis (Lightf.) Fr.

Terricolous in Mesobromion communities, incl. those with a slightly acidic soil, sometimes over siliceous, natural outcrops, rarely in dunes.

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

Luxembourg: Ard.: R, Lorr.: R.

France: Mar.: AR, Mosan: RR.

Lit.: Boul.: 68, La69: 143, Mü1: 146, NL84: 13, NL92: 169, Diederich (1985b: 30).