Tragopogon dubius Scop, has been found in 8 localities in the Netherlands, all from 1955 onwards, in dunes, and along roads and railway tracks. This might be caused by a natural extension of its area from North France northwards. T. dubius and T. porrifolius differ from T. pratensis in the dark coloured styles and the swollen peduncles, and slightly so in characters of habit and fruit; from each other they differ in the colour of the ligules and in the number of involucral bracts.