Solidago californica

Solidago californica is a species of goldenrod known by the common name California goldenrod.

It is native to western North America from Oregon through California to Baja California. It grows in many types of habitats, including oak woodlands, valley grassland, chaparral, and sometimes disturbed areas.

Description
Solidago californica is a rhizomatous perennial herb producing a hairy stem up to 1.5 m tall. The lance-shaped leaves are up to 14 cm long near the base of the plant, and smaller farther up.

The inflorescence is a narrow, often one-sided series or cluster of many flower heads. Each flower head contains many yellow disc florets and surrounded by up to 11 narrow yellow ray florets which measure up to 5 mm long.

Galls
This species is host to the fillowing insect induced galls: external link to gallformers
 * Asteromyia carbonifera (Osten Sacken, 1862)
 * Procecidochares anthracina (Doane, 1899)