45ac3812_des_Peninsula_Land_Conservancy__Notes_on_the_species
[Species] milk vetch (Astragalus trichopodus) [Notes on the species] 
This plant is used in the restoration areas to promote habitat for the Palos Verdes blue butterfly. It is a member of the pea family and produces interesting green-red inflated pods in which seeds can be heard rattling within.
Education & Research: Native Plants | Palos Verdes Peninsula Land Conservancy
Notes on the species