Chromosome Numbers From Central Northern Canada

Chromosome numbers are reported for 93 taxa from central northern Canada. It is pointed out that the collective species Dupontia fisheri actually includes three species differing in chromosome number, viz., D. psilosantha (2n = 44), D. pelligera (2n = 88), and D. fisheri s. str. (2n = 132). The taxon often named Carex saxatilis var. major is identified with C. physocarpa with 2n = 60 chromosomes whereas C. saxatilis s. str. has 2n = 80. Two new combinations are proposed: Argentina anserina ss. EGEDII (Wormskj.) Löve & Ritchie, and Menyanthes trifoliata ssp. MINOR (Raf.) Löve & Ritchie.