CYTOTAXONOMY OF THE NATIVE AND ADVENTIVE SPECIES OF HORDEUM, EREMOPYRUM, SECALE, SITANION, AND TRITICUM IN CANADA

Abstract

Cytotaxonomic data are reported for the genera Hordeum, Eremopyrum, Secale, Sitanion, and Tritícum. New nomenclature is: Hordeum geniculatum All. f. hirtellum (Degen ex Nevski) Bowden; Hordeum jubatum L. emend, subsp. × intermedium Bowden (subsp. breviaristatum Bowden × subsp. jubatum); Hordeum jubatum L. emend, subsp. breviaristatum Bowden; Hordeum leporinum Link var. simulans Bowden; and Eremopyrum bonaepartis (Spreng.) Nevski f. hirsutum (Bertol.) Bowden.Voucher specimens are cited for the following chromosome number determinations:(1) diploid, 2n = 14: Hordeum californicum, H. geniculatum, H. glaucum, H. marinum, H. pusillum, and Eremopyrum bonaepartis f. bonaepartis.(2) tetraploid, 2n = 28: Hordeum depressum, H. geniculatum, H. jubatum subsp. jubatum, H. jubatum subsp. × intermedium, H. jubatum subsp. breviaristatum, H. leporinum var. leporinum, H. murinum, Eremopyrum bonaepartis f. bonaepartis, E. bonaepartis f. hirsutum, and E. distans.(3) hexaploid, 2n = 42: Hordeum arizonicum and H. leporinum var. simulans.