Abstract
1) Somatic chromosomes of fifty three species in Poaceae were reported (Table 1, Figs. 1-53).
2) In Koeleria cristata, supernumerary chromosomes were observed.
3) In Calamagrostis arundinacea var. brachytricha and C. hakonensis, intraspecific polyploidy was found; in the former, hexaploids and octoploids; in the latter, tetraploids and octoploids.
4) The karyotypic differences between two closely related species Poa annua and P. acroleuca were mentioned.
5) The taxonomic problem of the genus Milium was considered.
6) The genera Torreyochloa and Glyceria were discussed from a karyotaxonomic standpoint.
