Dictamus albus occurs in the region of Klettgau (Canton of Schaffhausen) not only in the dry and warm Coronillo coronatae-Quercetum (Quercetalia pubescenti-petraeae), but also in mesophilic Carpinion forests (Galio-Carpinetum primuletosum, in part close to a Carici-Tilietum). This reflects the relatively continental character of the region.