Article révisé par les pairs
Résumé : The authors report, here, a comparative study of Urticaceae pollen rains in the European Economic Community. This family takes a great part in the annuel amount of pollen grains in the five countries of the E.E.C., but, its clinical influence seems to be minor, except in the Mediterranean area of France, where Parietaria is responsible of many cases of asthma. © 1977 Expansion Scientifique Française.