Trifolium micranthum Viv., in the last few years discovered in a number of localities on the islands of Vlieland and Ameland and in the province of Friesland, was found in 1965 in several other localities in the same province (dunes along the former Zuiderzee near Laaksum and many localities along the dike between Workum and the IJselmeer-dam; also on the island of Schiermonnikoog).