Plants tuft-forming, acaulescent, 2–15 cm, pilose-pilosulous, hairs basifixed; from branched caudex, branches obscured by thatch of persistent leaf bases. Leaves 2–15(–17) cm; stipules 3–11 mm, firm becoming papery; leaflets (3 or)5–19, blades elliptic to oblong, 3–35 mm, apex acute, surfaces strigose, hairs gray or silvery. Peduncles erect or incurved, 1–13(–14) cm. Racemes (1–)3–8-flowered, flowers ascending; axis 0.2–2 cm in fruit; bracts 4–8 mm; bracteoles 0. Pedicels 1.2–3 mm. Flowers (18–)22–27 mm; calyx cylindric, 10.5–16(–17) mm, pilose-villous, tube (7–)8–12(–13) mm, lobes subulate to narrowly lanceolate, 1.5–5.7 mm; corolla usually ochroleucous, faintly to strongly suffused with purple, rarely pink-purple; banner recurved through 40°; keel 18–22 mm. Legumes ascending (humistrate), brown, incurved, obliquely lanceoloid-ovoid, obcom­pressed, 15–40 × 5–10(–12) mm, unilocular, fleshy becoming leathery or subligneous, villous-hirsute, sur­face visible through long, shining hairs. Seeds 26–36.

Phenology: Flowering Apr–Jun.
Habitat: Sagebrush, pinyon-juniper, and mountain brush communities.
Elevation: 1300–2200 m.

Distribution

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Utah.

Discussion

Astragalus eurekensis is restricted to Juab, Millard, Sanpete, Sevier, Tooele, Utah, and Wasatch counties in central Utah; it overlaps the eastern margin of the geographic range of A. newberryi. The two are distin­guished easily by overall appearance, but constant dif­ferential criteria are absent. The fruits are hirsute rather than hirsute and tomentose, as in A. newberryi.

Selected References

None.

Lower Taxa

None.