Hedysarum occidentale var. canone
western sweetvetch
usually erect, (3–)5–8.5 dm.
8–23 cm;
leaflets 9–17, blades 12–29 × 9–16 mm, mostly 1–2 times longer than wide, becoming thickened, early deciduous.
axis 6–25 cm in fruit;
peduncle 6–14 cm.
corolla pale lavender-pink, (17–)20–25 mm.
Hedysarum occidentale var. canone
Variety canone is a Colorado Plateau endemic; it is based on specimens from Carbon, Duchesne, and Emery counties, Utah, and from western Colorado, that have proportionally short, thick leaflets that tend to be early deciduous and pale lavender-pink, relatively large flowers. Plants with similarly proportioned leaflets are known from elsewhere in the range of the species, especially in southwestern Wyoming, but the flowers are more strongly colored and on average smaller. The plants in this variety form an apparent trend in morphological variation with marked, but not absolute, geographical correlation. The type of Hedysarum uintahense approaches but does not equal this entity.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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