Tripleurospermum inodorum

Scentless mayweed, false chamomile, False Chamomile

Family: Asteraceae · Type: annual · Not Native

Scentless mayweed is a naturalized annual found in the North Coast and California Ranges in disturbed sites and roadsides at elevations below 1,500 meters. Flowering from May to August, this plant produces white ray flowers in daisy-like heads 3 to 4.5 centimeters wide, with rays becoming reflexed as they mature. Growing with glabrous or sparsely hairy stems 30 to 60 centimeters tall, it spreads readily in disturbed landscapes. Its finely divided leaves feature delicate, thread-like segments up to 8 centimeters long, giving the plant a feathery appearance. The fruit is approximately 2 millimeters long with distinctive white ribs and small resin glands.

Habitat: Disturbed sites, roadsides

Bloom period: May-Aug

Elevation: < 1500 m

Bioregions: NCo, CaR

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