Family: Polygonaceae (BUCKWHEAT).
Other common names: California spineflower.
Generic common name: SPINEFLOWER.
Cabrillo National Monument: sandy slopes on the ocean side of the peninsula, April 2009.
Characteristics: Native, White, Red, Small, Clusters, Simple, Herbaceous, Annual, Early Spring.
Status: CNPS List 4.2
Photographed out of range.
If you see this in or near the SMM floristic region we'd like to know.