Oncosiphon pilulifer

Oncosiphon pilulifer_stinknet_Ron Vanderhoff_cropped
Photo: Ron Vanderhoff

Synonyms: Matricaria globifera, Pentzia globifera, Oncosiphon piluliferum

Common names: stinknet; globe chamomile

Oncosiphon pilulifer (stinknet) is a strongly-scented annual herb (family Asteraceae) with round yellow flowers and finely dissected leaves found in the south coast and desert ranges of Southern California. It is native to South Africa. It favors dunes and scrub and chaparral habitat. It spreads via seeds which travel through human activities and machinery.

Cal-IPC Rating: High?

CDFA Rating: Q?


Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Species ID Card

Invasive Species ID Card - To support field identification of early detection species, Cal-IPC has designed a set of Species ID cards that can be downloaded, printed double-sided, and trimmed to size.

Weed Management Notes

No Weed RIC Management Notes are available for this species. Check for information on other species in the genus on the Weed RIC site.

Cal-IPC Newsletter Articles

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Oncosiphon pilulifer Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • EDDMapS - Distribution of this species in North America.
  • GBIF - Global distribution information.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • The Plant List - Global taxonomic resource and collaborative clearinghouse from Kew Gardens, the Royal Botanic Gardens, the Missouri Botanic Garden and others.
  • Additional photos

    Oncosiphon pilulifer_leaves and immature flower head_RonVanderhoff
    Oncosiphon pilulifer (stinknet) leaves and immature flower head. Photo: Ron Vanderhoff
    Oncosiphon pilulifer_flower heads_RonVanderhoff
    Oncosiphon pilulifer (stinknet) flower heads. Photo: Ron Vanderhoff
    Oncosiphon pilulifer_growth habit_DavidWilson
    Oncosiphon pilulifer (stinknet) growth habit. Photo: David Wilson
    Oncosiphon pilulifer_growth habit (senescent)_MaryHerr
    Oncosiphon pilulifer (stinknet) growth habit (senescent). Photo: Mary Herr