United States, California, Butte, Sacramento Valley. Oroville; south edge of the Feather River just northeast of Centennial Park. T19N R04E S08 SW1/4 USGS Quadrangle: Oroville 1:24,000
Slope at inner base of levee; plant mixed with native and non-native riparian vegetation, but some-what open. Plant a large sapling with main trunk about 12 cm diameter; flowers bright white; slightly older branches with hard spines 2.5 cm long; occasional, probably feral.