Monographs Details: Astragalus oophorus var. clokeyanus Barneby
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. 1964. Atlas of North American Astragalus. Mem. New York Bot. Gard. 13(2): 597-1188.
Description:Variety Description - Low and slender, the stems up to 1 dm. long; leaflets small, less than 1 cm. long, flowers like those of var. oophorus but much smaller, the calyx-tube 4—4.3 mm. long, 2.6—3.3 mm. in diameter, the teeth ± 2 mm. long; banner obovate-cuneate, ± 5 mm. wide; wings as long as the banner, the claws 5 mm., the narrowly oblong blades 7 mm. long, 1.5 mm. wide; keel-claws 5 mm., the blades 4.6 mm. long, 2.7 mm. wide; gynophore 3.5-5.5 mm. long; pod 2-3.7 cm. long.

Distribution and Ecology - Open slopes in yellow pine forest, in gravelly soils derived from limestone, 8100-9100 feet, known only from the east slope of Charleston Peak, Clark County, Nevada.—Map No. 105.—June and July.

Discussion:The var. Clokeyanus closely resembles the typical form of the egg milk-vetch except for the much smaller flowers and relatively few-ovulate pod. Known only from the upper reaches of Lee Canyon, it is locally plentiful at the lower edge of the forest belt.
Distribution:Nevada United States of America North America|