Lotus corniculatus L. var. sativus Chrtková-Žertová is an erect form of Birdsfoot-trefoil, up to 0.5 m high, with hollow stems. It is a component of a commercial (grass) seed mixture which is sown in sandy road verges all over the country. At the Lauwerszee polder it appeared to hybridize with wild populations with prostrate habit and solid stems.