Wederom een nieuwe Juncus voor Nederland

Once again a new North American Juncus-species has been found in the Netherlands. In 1972 J. canadensis J. Gay ex Laharpe was discovered in the southern part of the country near Reusel in the province of N.-Brabant (ADEMA, 1974) in connection with a record from Belgium, where the species occurs abundantly now in 6 hour-squares (D’HOSE, 1976). In 1974 J. ensifolius Wikstr. was found in the northern part of the country, viz. along the canalized Sleener stream near Emmen in the province of Drente. The discovery of this new rush for the Netherlands does not elucidate the problem of the origin of North American species in Europe.