Flora of North America species comparison

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Hedysarum boreale subsp. boreale
Photo is of parent taxon

northern hedysarum, Utah sweetvetch
Stems

usually branched distally, (1.7–)2.5–7 dm.
Leaves

3–12 cm;

stipules usually pale brown, sometimes brown-streaked;

leaflets 5–15, blades 7–35 × 2–19 mm, surfaces pubescent abaxially, pubescent or glabrous adaxially.
Racemes

13–45-flowered, elongated, 8–23 cm.
Flowers

corolla usually pink to magenta (fading pink to lavender) or purple, rarely white, 10–19 mm.
Loments

segments 2–5, rarely black-pigmented, 6.5–9 × 5.4–6.2 mm.
2n

= 16.

Hedysarum boreale subsp. boreale
Phenology Flowering late spring–summer.
Habitat Short-grass prairies, salt-desert shrub, sagebrush, pinyon-juniper, juniper, mountain brush, and aspen communities.
Elevation 500–2500 m. (1600–8200 ft.)
Distribution
from FNA
AZ; CO; ID; MT; ND; NM; NV; OK; OR; SD; TX; UT; WY; AB; BC; MB; SK
[BONAP county map]
Discussion

T. E. Northstrom (1974) attempted to recognize two taxa from among the materials included within the concept of subsp. boreale, based on degree and position of pubescence on the leaflets. The attempt resulted in a not very convincing segregation, which is not clearly geographically correlated. Consequently, all are treated here in subsp. boreale. Specimens from northeastern Utah in which the loment segments bear lateral prickles have been recognized as Hedysarum boreale var. gremiale.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Hedysarum > Hedysarum boreale
Sibling taxa
H. boreale subsp. mackenziei
Synonyms H. boreale var. cinerascens, H. boreale var. gremiale, H. boreale var. obovatum, H. boreale var. utahense, H. carnosulum, H. cinerascens, H. gremiale, H. mackenziei var. canescens, H. mackenziei var. fraseri, H. mackenziei var. pabulare, H. pabulare, H. pabulare var. rivulare, H. utahense
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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