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Astragalus curvicarpus var. brachycodon

Astragalus curvicarpus (A. Heller) J.F. Macbr. var. brachycodon (Barneby) Barneby

Curvepod Milkvetch, Short-belled Curvepod Milkvetch

Fabaceae (Pea family)

Synonym(s): Astragalus whitedii var. brachycodon

USDA Symbol: ASCUB

USDA Native Status: L48 (N)

"Similar to Astragalus var. curvicarpus, the stems usually slender, 2-4 dm. long, the herbage strigulose with appressed, or loose and incurved, sometimes flattened hairs up to 0.25-0.4 mm. long." (bibref: 1813).

"The Astragalus var. brachycodon is geographically intermediate between Astragalus var. curvicarpus and Astragalus var. subglaber and also morphologically so to the extent that it combines the relatively copious leaf pubescence of the former with the (nearly always) glabrous pod of the latter. It differs from both in the smaller flowers, which are subject to some variation in length, and the largest slightly overlap the measurements recorded for Astragalus var. curvicarpus. The blade of the banner is ordinarily well developed, as in Astragalus var. curvicarpus, and not both shortened and abruptly replicate distally as is usual in Astragalus var. subglaber and the closely related A. collinus. The calyx of the smallest flowers of Astragalus var. brachycodon is scarcely tumid and obscurely saccate at base, sometimes only abruptly truncate, with the pedicel attached at right angles to the lower corner.." (bibref: 1813).

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Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Alternate
Fruit Type: Legume
Size Notes: "The stems usually slender, 2-4 dm. long." (bibref: 1813).
Leaf: "The leaflets pubescent on both sides but sometimes thinly so above; leaflets (9) 13-19 (21), 3-11 (15) mm. long." (bibref: 1813).
Flower: "Pedicels at anthesis 1-1.5 mm., in fruit 1.4-2.3 mm. long; calyx 6.1-8.5 (9.3) mm. long, the disc 0.9-1.3 mm. deep, the deeply campanulate or rarely cylindric tube 5.4-7.6 (8.6) mm. long, 2.9-3.5 (4.1) mm. in diameter, the teeth 0.4-1 mm. long; banner rhombic-oblanceolate, 13.6-15 (16.8) mm. long, 5.4-8.2 mm. wide, recurved through about 45 degrees; wings 11.5-14.2 (15.2) mm. long, the claws 5.5-7.4 (8.8) mm., the blades 6.4-8.1 mm. long, 2.3-3.3 mm. wide; keel 9.4-11.6 (12.3) mm. long, the claws 5.3-7 (7.9) mm., the blades 4.4-5.6 mm. long, 2.6-3.3 mm. wide." (bibref: 1813).
Fruit: "Stipe of the pod 6-12 (15) mm. long, the body 1.4-2.2 cm. long, 3-4 (4.5) mm. wide, lunately incurved or hamate, glabrous; ovules 15-21; seeds (2) 2.3-3.1 mm. long." (bibref: 1813).

Bloom Information

Bloom Color: White , Yellow
Bloom Time: May , Jun , Jul
Bloom Notes: "Petals ochroleucous, clear white, or lemon-yellow." (bibref: 1813).

Distribution

USA: OR
Native Distribution: "Locally plentiful on the upper forks of the Deschutes River in Crook, Jefferson, and Deschutes Counties, Oregon." (bibref: 1813).
Native Habitat: "Plains and hillsides, in rough basaltic gravel or pumice sand, 2800-3800 feet." (bibref: 1813).

Bibliography

Bibref 1813 - Atlas of North American Astragalus (1964) Barneby, Rupert C.

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Additional resources

USDA: Find Astragalus curvicarpus var. brachycodon in USDA Plants
FNA: Find Astragalus curvicarpus var. brachycodon in the Flora of North America (if available)
Google: Search Google for Astragalus curvicarpus var. brachycodon

Metadata

Record Modified: 2020-12-07
Research By: Joseph A. Marcus

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