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Salicaceae » Salix scouleriana
Origin: Native
Voucher:WTU (view specimen records)
Notes: FNA7: "Western Salix scouleriana and eastern S. humilis are closely related and are sometimes difficult to separate. Although there is an apparent range disjunction between them in western Manitoba, it may be a collecting gap. In general, S. scouleriana differs from S. humilis in being a taller shrub, sometimes even tree-like, with broader leaves and longer catkins, floral bracts, stigmas, and styles, but these quantitative characteristics all overlap. The apparent difference in anther length (S. scouleriana 0.7-1.2 mm; S. humilis 0.4-0.6 mm) may be correlated with a difference in chromosome number. Salix scouleriana is tetraploid (Y. Suda and G. W. Argus 1968); S. humilis has been reported to be both diploid (Suda and Argus; L. Zsuffa and Y. Raj, unpubl.) and tetraploid (R. D. Dorn 1976). The latter count was from the same population as the one by Suda and Argus. Further chromosome counts are indicated.
Salix scouleriana forms natural hybrids with S. hookeriana, S. planifolia, and S. pulchra."
Literature:
(none)
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Photo © Clayton J. Antieau
(from WTU Image Collection)
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Taxon treatment authored by Fred Weinmann; last updated 4/12/2010 by David Giblin
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| Salix scouleriana Barratt ex Hook. var. brachystachys (Benth.) M.E. Jones
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| Salix scouleriana Barratt ex Hook. var. coetanea Ball
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| Salix scouleriana Barratt ex Hook. var. crassijulis (Anderss.) Schneid.
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| Salix scouleriana Barratt ex Hook. var. flavescens (Nutt.) J.K. Henry
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| Salix scouleriana Barratt ex Hook. var. poikila Schneid.
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| Salix scouleriana Barratt ex Hook. var. thompsonii Ball
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| Salix stagnalis Nutt.
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Burke Museum of Natural History and Culture.
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