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The Genus Hedysarum In North America, Terry Edwin Northstrom
The Genus Hedysarum In North America, Terry Edwin Northstrom
Theses and Dissertations
In North America, Hedysarum taxa extend from southern Arizona to Banks Island and from northern Alaska to Newfoundland. They exhibit a high degree of polymorphism which is usually expressed in the form of a gradient in morphological characteristics. Four species, one subspecies and four varieties are recognized, including one new combination, H. boreale ssp. boreale var. rivulare (Williams) Northstrom. Comparative anatomical and morphological studies revealed two basic patterns. Chromosome numbers of all taxa were determined. The basic chromosome number of H. alpinum, H. sulphurescens and H. occidentale is n=7. The basic chromosome number of H. boreale is n=8. Seed protein …