Astragalus cutleri

(Barneby) S. L. Welsh

Great Basin Naturalist 58: 51. 1998.

Common names: Cutler’s milkvetch
EndemicConservation concern
Basionym: Astragalus preussii var. cutleri Barneby Great Basin Naturalist 46: 256. 1986
Treatment appears in FNA Volume 11.

Plants sometimes flowering first year, forming large, bushy clumps, 10–30(–35) cm, sparsely strigulose to glabrate; from superficial caudex. Stems ascending to erect, sparsely strigulose to glabrate. Leaves 3–13 cm; stipules 2–6.5 mm; leaflets 5–17(or 19), blades elliptic to lanceolate, oblanceolate, or obovate, 3–17(–20) mm, apex acute to obtuse or apiculate, surfaces strigulose or glabrous abaxially, glabrous adaxially. Peduncles 2.5–10 cm. Racemes 5–9-flowered; bracts 1.5–2.5 mm; bracteoles 2. Pedicels 1.5–2.5 mm. Flowers 15–16 mm; calyx pale purple or whitish, cylindric, (7.3–)7.5–8.5(–9) mm, sparsely black-strigose, tube 5.9–6.7 mm, lobes subu­late, 1.3–1.7(–2.3) mm; corolla white or tinged purplish (or drying purplish); banner recurved through 40–45°. Legumes ascending to erect, greenish sometimes suf­fused with purple, oblong-ellipsoid, inflated, 14–18 × 9–11 mm, thinly cartilaginous, glabrous; unilocular; stipe 3–3.5 mm. Seeds 20–38.


Phenology: Flowering Apr–May.
Habitat: Saltbush and blackbrush com­munities, on Permian Formations.
Elevation: 1100–1300 m.

Distribution

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Utah.

Discussion

Astragalus cutleri, restricted to San Juan County, was earlier thought to be an annual, but more recent collections demonstrated that it is at least a short-lived perennial.

Selected References

None.

Lower Taxa

None.
... more about "Astragalus cutleri"
Stanley L. Welsh +
- Barneby S. L. Welsh +
Astragalus preussii var. cutleri +
Cutler’s milkvetch +
1100–1300 m. +
Saltbush and blackbrush communities, on Permian Formations. +
Flowering Apr–May. +
Great Basin Naturalist +
Endemic +  and Conservation concern +
Papilionoideae de +
Astragalus cutleri +
Astragalus sect. Preussiani +
species +