Rosaceae, Rosales. Holodiscus: Gr., whole disk. Discolor: Lat., having a different color; variegated.
ID features: shrub; leaves alternate, simple, pinnately veined, with teeth (not lobed); inflorescence raceme or panicle; petals generally white (not pink); hypanthium saucer-shaped (not obconic to bell-shaped); pistils 5, ovary superior.
Highly variable. Only species in genus in CA.
Coming up under a mesquite tree. Smells sickly sweet. Attracting flies.
Railyard Park Santa Fe
Along the road through Zion National Park
Puffy/smooth leaves. Grows as a bush. Leaves grow in layers.