MYOSURUS MINIMUS CROP-WEED VEGETATION IN NORTHERN FRANCE

Myosurus minimus crop-weed vegetation in northern France. - Recent pro spection in Nord-Pas-de-Calais region revealed the existence of the Ra nunculo-Myosuretum minimi in several crop-fields on wet soils, from lo cations fairly remote from each other. Eleven releves are arranged in a table; it allows to distinguish two phytosociological groups. The re sults are compared with other releves from European phytosociological literature. Phenological, ecological and chorological aspects of this association are discussed.