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Emory's Milkvetch

Astragalus emoryanus (Rydb.) Cory

Comprehensive Description

provided by North American Flora
Hamosa emoryana Rydb. Bull. Torrey Club 54: 327. 1927
Astragalus NuUallianus var. A. Gray, PI. Wright. 1: 52. 1852.
Astragalus NuUallianus var. [no. 1 and no. 2, in part| A. Gray, PI. Wright 2: 43. 1853.
Astragalus NuUallianus Jepson. Man. Fl. PI. Calif. 579, mainly. 1925.
An annual; stem 1-3 dm. high, erect or decumbent below, branched at the base; leaves 3-5 cm. long, ascending; stipules lanceolate, 2-4 mm. long; leaflets 9-17, elliptic or oblong, obtuse or those of the upper leaves lance-oblong and acute, 2-10 mm., rarely up to 12 mm. long, strigose on both sides; peduncles 2-8 cm. long; racemes short, 31 0-flowered ; bracts subulate, 2 mm. long; calyx strigose, the tube 2 mm. long, the teeth subulate, about as long; corolla purple-tipped; banner obovate, retuse, 6-7 mm. long; wings 5-6 mm. long, the blade oblanceolate, with a reflexed auricle; keel-petals shorter, broadly lunate, acutish; pod glabrous, linear, 2 cm. long, 3 mm. wide and thick, arcuate throughout, but more strongly so towards the base, cordate in cross-section.
Type locality: El Paso, Texas.
Distribution: Western Texas to southeastern California, Chihuahua, and Coahuila.
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bibliographic citation
Per Axel Rydberg. 1919. (ROSALES); FABACEAE; PSORALEAE. North American flora. vol 24(1). New York Botanical Garden, New York, NY
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Physical Description

provided by USDA PLANTS text
Annual, Herbs, Taproot present, Nodules present, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Stems or young twigs sparsely to densely hairy, 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 10-many, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals pinkish to rose, Petals blue, lavander to purple, or violet, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, 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, Fruit a legu me, Fruit tardily or weakly dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit strongly curved, falcate, bent, or lunate, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit 3-10 seeded, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.
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cc-by-nc-sa-3.0
compiler
Dr. David Bogler
source
Missouri Botanical Garden
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USDA NRCS NPDC
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USDA PLANTS text