Kohler's Medizinal-Pflanzen in naturgetreuen Abbildungen mit kurz erlauterndem Texte :.Gera-Untermhaus :Fr. Eugen Kohler,[1883-1914].biodiversitylibrary.org/page/303666
2009.08.10: Austria, Lower Austria, district Schwechat/WU, 178 m AMSL, ruderal community (rubble soil) near road: flower close-up.Flowering from may till september.Quite common.German names: Echt-Steinklee, Gewhnlicher S., Acker-S.ID: Fischer, Exkursionsflora 3rd
2010-10-12 Vienna X. district/ Lower Austria, district Wien-Umgebung (on Austrian side of Johannesberg, 206 m AMSL).For remarks about the habitat see here.All but dry plant, still flowering.German name: Echt-Steinklee