Astragalus newberryi var. blyae (Rose ex Rydb.) Barneby
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Authors
Rupert C. Barneby
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Authority
Barneby, Rupert C. 1964. Atlas of North American Astragalus. Mem. New York Bot. Gard. 13(2): 597-1188.
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Family
Fabaceae
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Scientific Name
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Type
"Type collected at an altitude of 3500 feet on ridges one and one-half mile northwest of Kingman, Arizona, in 1927, Mrs. Charles Bly (U. S. Nat. Herb.)." Holotypus, US! isotypus, NY!
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Description
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Variety Description - Leaflets 9-13; calyx 8-11.5 mm. long, the deeply campanulate tube (5) 6-8.5 mm. long, 4-4.7 mm. in diameter, the teeth 2-3 mm. long; wings 13-18.6 mm. long, the claws 6.5-11.2 mm., the blades 7.5-9.4 mm. long, ± 2.3 mm. wide; keel-blades 5.7-7 mm. long, 2.2-2.8 mm. wide; anthers 0.45-0.65 mm. long.
Distribution and Ecology - Dry rocky hillsides and canyons, on limestone or basaltic gravels, in a zone transitional between Larrea desert and desert grassland, 3500-4400 feet, locally plentiful in western Mohave County south of the Colorado River, northwestern Arizona.—Map No. 84.—Late March to May.
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Discussion
The Bly milk-vetch constitutes a minor modification of the widely dispersed A. Newberryi distinguished only by its small flowers and by its occurrence within or at the upper edge of the Larrea belt. Field experience has shown that it forms vigorous and uniform colonies and is therefore more than a depauperate state of A. Newberryi. It is further distinguished from the nomenclaturally typical phase of var. Newberryi, found on the Peach Springs Plateau immediately to the east and again in the Providence and New York Mountains across the Colorado River immediately to the west, in its slightly more numerous leaflets and, often, by its more nearly hirsute pubescence. The hairs on the calyx vary as in var. Newberryi from black to white, although black is predominant in the majority of specimens.
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Objects
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Distribution
Arizona United States of America North America|