Biosystematics of the Tribe Satureineae (Labiatae) in Canada I

Abstract

Chromosome counts of 11 species and five hybrids from the Canadian material have been determined and their distribution maps are given. Five of these counts are new reports. The new basic chromosome numbers for two genera i.e. Collinsonia (x=13) and Hedeoma (x=19) have been suggested. Reproductive biology and the variational trends in these taxa have been studied. Keys to the Canadian species of three genera i.e. Hedeoma, Lycopus and Mentha have been provided. It has been proved that Lycopus virginicus does not occur in Canada.