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San Joaquin Milkvetch

Astragalus asymmetricus Sheldon

Comprehensive Description

provided by North American Flora
Phaca asymmetrica (Sheldon) Rydberg
Astragalus leacophyllus T. & G. Fl. N. Am. 1: 336. 1838. Not A. leucophyllus Willd. 1803.
Phaca leucophylla H. & A. Bot. Beech. Voy. 333. 1840.
Tragacantha leucophylla Kuntze, Rev. Gen. 946. 1891.
Astragalus asymmelricus Sheldon, Minn. Bot. Stud. 1: 23. 1894.
Astragalus leucopsis leucophyllus M. E. Jones, Contr. W. Bot. 8: 23. 1898.
Astragalus leucopsis asymmelricus M. EJones, Contr. W. Bot. 10: 62. 1902.
Perennial, perhaps up to 1 m. high; stem white, silky-canescent, strigose; leaves S— 12 cm. long, ascending; stipules broadly deltoid, about 5 mm. long and fully as broad; petioles 0.5-2 cm. long, as well as the rachis canescent; leaflets 19-37, linear or oblong, rather firm, whitesilky on both sides, 1-2 cm. long, 3-5 mm. wide; peduncles 5-15 cm. long; racemes about 5 cm. long, in fruit sometimes I dm. long; bracts subulate, calyx silvery-canescent, the tube cylindrocampanulate, 5-6 mm. long, the lobes subulate, 2-4 mm. long; corolla ochroleucous, 14—16 long; banner obovate, gradually tapering into the broad claw; blade of the wings oblong-lunate, obtuse, about equaling the claw in length, with a large acute basal auricle; keel-petals similar but the blades broader; fruit silky-canescent when young, becoming glabrate except the stipe, the stipe in fruit 2.5-3 cm. long, the body oval-ellipsoid, 3-4 cm. long, 1.5-2 cm. wide and thick.
Type locality: California.
Distribution: Central and southern California.
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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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North American Flora

Astragalus asymmetricus

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Astragalus asymmetricus is a species of milkvetch known by the common name San Joaquin milkvetch. It is endemic to California, where it grows in grassy and disturbed areas in the Central Valley and nearby parts of the Central Coast Ranges and San Francisco Bay Area.[2]

Description

Astragalus asymmetricus is a sturdy perennial herb growing a thick, erect stem to heights between 50 and 120 cm (20 and 47 in). It is coated in long hairs. The leaves are up to 20 cm (7.9 in) long and are made up of many pairs of leaflike leaflets, each up to 2.5 cm (0.98 in) long and varying in shape from linear to oval. The inflorescence contains 15 to 45 cream-colored pealike flowers 1 to 2 cm (0.39 to 0.79 in) long.

The fruit is a slightly inflated hairy legume pod up to 4 cm (1.6 in) long which hangs in bunches from the dried inflorescence.

References

  1. ^ "NatureServe Explorer - Astragalus asymmetricus". NatureServe Explorer Astragalus asymmetricus. NatureServe. 2022-05-30. Retrieved 30 May 2022.
  2. ^ "San Joaquin Milk Vetch, Astragalus asymmetricus".

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Astragalus asymmetricus: Brief Summary

provided by wikipedia EN

Astragalus asymmetricus is a species of milkvetch known by the common name San Joaquin milkvetch. It is endemic to California, where it grows in grassy and disturbed areas in the Central Valley and nearby parts of the Central Coast Ranges and San Francisco Bay Area.

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