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Astragalus ackermanii
Astragalus ackermanii Barneby
Ackerman's Milkvetch
Fabaceae (Pea family)
Synonym(s):
USDA Symbol: ASAC5
USDA Native Status: L48 (N)
"A semi-woody, long-lived perennial herb, 1-5 dm tall, with an intricately entangled, tuft-forming habit and bell-shaped flowers." (webref: 52). "Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy." (webref: 28).
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Plant Characteristics
Duration: PerennialHabit: Herb
Leaf Arrangement: Alternate
Fruit Type: Legume
Size Notes: "1-5 dm tall." (webref: 52).
Leaf: "Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules membranous or chartaceous, Stipules persistent, Stipules free, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 5-9, Leaflets 10-many, Leaves hairy on one or both surfaces." (webref: 28).
Flower: "Flowers in axillary clusters or few-flowered racemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals red, Petals blue, lavander to purple, or violet, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auricu late, spurred, or gibbous, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit." (webref: 28).
Fruit: "Fruit a legume, Fruit stipitate, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit strongly curved, falcate, bent, or lunate, Fruit or valves persistent on stem, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black." (webref: 28).
Bloom Information
Bloom Color: Red , Blue , Purple , VioletBloom Time: May , Jun
Bloom Notes: "Petals red, Petals blue, lavander to purple, or violet." (webref: 28).
Distribution
USA: NVNative Distribution: "Clark and Lincoln counties, Nevada. Apparently endemic to the Sheep and Pintwater ranges. Maximum range dimension 56.1 km (34.9 mi) excluding most disjunct record." (webref: 52).
Native Habitat: "Crevices and ledges of carbonate cliffs in the mixed shrub, sagebrush, and juniper woodland zones; 4000-6200 feet (1219-1890 meters)." (webref: 52).
Web Reference
Webref 28 - NatureServe Explorer: An online encyclopedia of life (2018) NatureServeWebref 52 - Rare Plant Fact Sheet (2002) NEVADA NATURAL HERITAGE PROGRAM
Additional resources
USDA: Find Astragalus ackermanii in USDA PlantsFNA: Find Astragalus ackermanii in the Flora of North America (if available)
Google: Search Google for Astragalus ackermanii
Metadata
Record Modified: 2020-12-07Research By: Joseph A. Marcus