Astragalus williamsii Rydb.
Publ. & Syn.Rydb., Bull. New York Bot. Gard. 2: 175 (1901). Holotype (NY): Canada: the Yukon Territory, the Big Salmon River, 22. Aug. 1899, leg. Williams.
NotesAstragalus williamsii reaches the Borderline Arctic in the Brooks Range in northern Alaska (Hultén 1947, 1968a).
Chromosomes48 (6x). - Ledingham and Rever (1963).
Not included: A report of 2n = 32 (4x) from Churchill at Hudson Bay in Manitoba (Löve and Löve 1982b), far outside its accepted geographical range.
GeographyAmerican Beringian: (ALA).
Distribution N = S     AN = b     E = b     [ key ]
Parent taxonAstragalus L.
PAF ID630516
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Panarctic Flora Editor-in-Chief: Reidar Elven (Natural History Museum, University of Oslo)
Editorial Committee: Reidar Elven, David F. Murray (Museum of the North, University of Alaska), Volodya Yu. Razzhivin (Komarov Botanical Institute, Russian Academy of Sciences), Boris A. Yurtsev [deceased] (Komarov Botanical Institute, Russian Academy of Sciences)