Not an accepted name (status: unknown). The accepted name is Rhododendron occidentale (Torr. & A.Gray) A.Gray, 1876.

Rhododendron occidentale var. californicum (Torr. & A.Gray ex Durand) Hrusa, 1876 2% complete

No common name

S.Watson & al., Bot. California 1: 458 (1876)

There is no corrections for Rhododendron occidentale var. californicum yet.