Monographs Details: Astragalus castaneiformis var. consobrinus Barneby
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. 1964. Atlas of North American Astragalus. Mem. New York Bot. Gard. 13(2): 597-1188.
Family:Fabaceae
Description:Variety Description - Usually very dwarf and condensed, without perceptible caudex, sometimes flowering the first season; racemes 2-7-flowered, the axis 1-10 mm. long in fruit; pedicels at anthesis 1.2-1.5 mm., in fruit 2-2.3 mm. long; calyx usually tapering toward the base, narrowly vase-shaped; petals white or whitish except for the pinkish keel-tip, turning ochroleucous when dry; wings 10.1-14.7 mm., the claws 4.8-7 (7.5) mm. long; keel 8.3-12 mm., the claws 5-7.6 mm. long; anthers 0.5-0.65 mm. long; pod obliquely ovoid or lance-ovoid, either nearly straight or gently incurved.

Distribution and Ecology - Open gravelly or sandy knolls, barren stony hillsides, and cobblestone bluffs, in alluvial soils of varied composition, but only rarely on basalt, sometimes in yellow pine forest, 6000-8000 feet, apparently not common but sometimes locally plentiful on both slopes of the Colorado-Sevier watershed in eastern Sevier, western Wayne, Piute, and western Garfield Counties, Utah.—Map No. 90.—May to June. June.

Discussion:The var. consobrinus is an inconspicuous little plant, sometimes flowering precociously as a leafy tuft only 3—4 cm. across, but eventually developing a woody caudex. It coincides in range with forms of A. argophyllus but may be distinguished by the hair-attachment and by the flower’s small size.
Distribution:Utah United States of America North America|