Astragalus scaphoides (Bitterroot milkvetch), is a flowering plant in the family Fabaceae, found only in a small area of southwest Montana and adjacent parts of Idaho. It grows on shallow, south-facing slopes, in semi-arid sage scrub.
Astragalus scaphoides is a perennial herbaceous plant, with pinnate leaves. The pale yellow flowers open in May and are visited by several species of bumblebees and solitary bees, including species from the genera Osmia and Anthophora.
- Gurevitch, J., S. M. Scheiner, and G. A. Fox. The Ecology of Plants, Second Edition. Sinauer Associates, Inc., Sunderland MA USA
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