Shaggy Milkvetch

Astragalus malacus A. Gray

are host of

• Global Biotic Interactions: Uromyces pisi-sativi (Pers.) Liro 1908
• Global Biotic Interactions: Uromyces pisi-sativi (Pers.) Liro 1908
• Global Biotic Interactions: Uromyces pisi-sativi (Pers.) Liro 1908
• Global Biotic Interactions: Stigmatula astragali (Lasch) P. F. Cannon 1996

have flowers visited by

• Global Biotic Interactions: Chlosyne gorgone Hübner (1806) (Gorgone Checkerspot)
• Global Biotic Interactions: Erynnis telemachus Burns 1960 (Rocky Mountain Duskywing)
• Global Biotic Interactions: Erynnis brizo Boisduval & Le Conte 1832 (Sleepy Duskywing)