California Invasive Plant Council

Dittrichia graveolens

Synonyms: Inula graveolens, Erigeron graveolens, Cupularia graveolens

Common names: stinkwort; stinkweed; Khaki weed;

Dittrichia graveolens (stinkwort) is a fall-flowering, sticky aromatic annual (family Asteraceae) that appears to be rapidly expanding its range in California.

Cal-IPC Rating: Moderate — Alert

CDFA Rating: B*

Cal-IPC Assessment

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

• Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

• Managing stinkwort. Woolen, Kevin, IPM Specialist, San Francisco Water Enterprise. Vol 28, Issue 1
• FROM THE DIRECTOR’S DESK: Renewing the Cal-IPC Inventory. Johnson, Doug. Vol 25, Issue 2
• Early Detection in Bay Area National Parks. Wrubel, Eric. Vol 23, Issue 3
• Cal-IPC partners to protect military lands. Brusati, Elizabeth. Vol 23, Issue 2
• CDFA expands noxious weed list and revises process. Kelch, Dean. Vol 23, Issue 2
• The volunteer contribution. Cal-IPC. Vol 22, Issue 2
• Mendocino County stops northbound stinkwort. Morse, Chuck. Vol 21, Issue 2
• Stinkwort: history, research, and management. Brownsey, Rachael; Kyser, Guy; DiTomaso, Joseph. Vol 20, Issue 2
• Wildland Weed News. Cal-IPC. Vol 20, Issue 1
• Prioritizing Regional Response to Invasive Plants in the Sierra Nevada. Brusati, Elizabeth; Morawitz, Dana; Powell, Cynthia. Vol 19, Issue 2

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.

• A tale of two wildfires: post-fire weed management at Pepperwood Preserve. Friedfel, Devyn; Halbur, Michelle; Gillogly, Michael; Barringer, Sonja; Comendant, Tosha (2020)
• A test of the herbicide Weed Slayer for the control of invasive plants. Thomas, Don (2020)
• Characteristics of plant communities invaded by Dittrichia graveolens as it spreads away from roadsides in Santa Clara County. Lopez, Andrew; Melen, Miranda; Lustenhouwer, Nicky; Parker, Ingrid (2020)
• Early detection and rapid response: effective weed control at the landscape level. Farrell, Sharon; Patterson, Jesse; Kesel, Rachel; Brigham, Christy; Gregory, Nathan; Gardner, Leah (2020)
• Using climate niche modeling to map areas at risk of invasion by stinkwort (Dittrichia graveolens). Lustenhouwer, Nicky; Parker, Ingrid (2020)
• Evolutionary drivers of the invasion of stinkwort (Dittrichia graveolens) in California. Lustenhouwer, Nicky (2019)
• Successes, failures, and lessons from the Orange County CNPS Emergent Invasive Program. Vanderhoff, Ron (2019)
• Evolution of an invasive plant control program – adoption of early detection and rapid response. Mitrovich, Milan (2018)
• The spread and control of Dittrichia graveolens. Marriott, Meg (2010)

Other Dittrichia graveolens Information

• CalPhotos - Images of plants taken mostly in California.
• Calflora - See the distribution of this species on Calflora's map of California.
• CalWeedMapper - Distribution information with ability to determine regional priorities.
• Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
• USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.
• EDDMapS - North American distribution based on Early Detection and Distribution Mapping System.