Broadleaf Stonecrop
Sedum spathulifolium

Family: Crassulaceae (STONECROP).
Other common names: broadleaf sedum, Colorado stonecrop, spoon-leaved stonecrop.
Generic common name: STONECROP.

Location: Malibu Creek State Park: steep rocky slopes above creek near Century Lake, chaparral, July 2011.

Characteristics: Native, Yellow, Small, Clusters, Simple, Herbaceous, Perennial, Late Spring.

I've not managed to catch this in flower yet (just missed it again in 2012).