Oncosiphon pilulifer

Stinknet

Family: Asteraceae · Type: annual · Not Native

Conservation status: Cal-IPC Yes

Stinknet is a naturalized annual found in southern California coastal regions, including San Diego and the Peninsular Ranges, in disturbed sites, coastal scrub, and chaparral at elevations below 500 meters. Flowering from March to July, this plant produces small, spherical yellow-green flower heads approximately 5 to 8 millimeters in diameter. Growing with branched stems 15 to 45 centimeters tall, often reaching up to 70 centimeters, with a distinctively pungent scent. Its leaves are 1 to 4 centimeters long, covered in fine, short hairs and spread throughout the plant's branching structure. The tiny flowers have pale corollas measuring 1.5 to 2 millimeters long, with fruits measuring just 0.6 to 0.8 millimeters at maturity.

Habitat: Disturbed sites; coastal scrub, chaparral

Bloom period: Mar-Jul

Elevation: < 500 m

Bioregions: SCo, PR, DSon

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.