Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Astragalus bisulcatus var. haydenianus
Photo is of parent taxon

Hayden's milkvetch
Habit Plants stout, erect or diffuse and spreading, herbage usually pubescent.
Leaflets

(13–)21–35, 5–27 mm.
Racemes

35–80-flowered;

axis (4–)5.5–25 cm in fruit;

bracts (2.5–)3–5 mm.
Flowers

8–11 mm;

calyx usually pallid, tube 3.1–4 mm, lobes 1–2.7 mm;

corolla white or whitish to ochroleucous;

banner longer than keel.
Legumes

ellipsoid or oblong-ellipsoid, (5–)6.5–9.5 × 2–4 mm, transversely rugose-reticulate, strigulose;

stipe 1.4–3 mm.
Seeds

5–8.
2n

= 24.

Astragalus bisulcatus var. haydenianus
Phenology Flowering May–Jul.
Habitat Sagebrush-mountain brush, pinyon-juniper, ponderosa pine, and spruce-fir com­munities, on fine-textured, often saline, seleniferous substrates.
Elevation 1900–3300 m. (6200–10800 ft.)
Distribution
from FNA
AZ; CO; NM; UT; WY
[BONAP county map]
Discussion

Variety haydenianus from the Wasatch Plateau in Utah has been confused by some workers with the similarly pale-flowered var. major, but the flowers are consistently smaller, much more numerous, and the fruits smaller than in var. major.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Bisulcati > Astragalus bisulcatus
Sibling taxa
A. bisulcatus var. bisulcatus, A. bisulcatus var. major, A. bisulcatus var. nevadensis
Synonyms A. haydenianus, A. bisulcatus subsp. haydenianus, A. grallator, Diholcos haydenianus, Tragacantha haydeniana
Name authority (A. Gray) Barneby: Mem. New York Bot. Gard. 13: 413. (1964)
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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers