Biomeacute;trie et symeacute;trie des inflorescences de charme

摘要

The studied area concerns the inflorescence of the yoke elm,Carpinus betulus, and especially the lobes of the involucre surrounding the fruit for groups of two flowers, which form these inflorescences. Data come from three natural populations, geographically distinct. Two fluctuating asymmetries and two directional asymmetries are noted in the system. Their characteristics and the relations between them are examined. The interpretation takes into account the ontogenesis of the flower structure and leads to a discrimination between populations.