Synonyms: Iris acoriformis, Iris bastardi, Iris curtopetala, Iris lutea, Iris paludosa
Common names: yellowflag iris; pale yellow iris
Iris pseudacorus (yellowflag iris) (family Iridaceae) invades wetlands and meadows along coastal California and some inland counties. Iris pseudacorus is a fast-growing and rapidly-spreading invasive plant that can out-compete other wetland plants, forming almost impenetrable thickets, in much the same way as cattails do.Cal-IPC Rating: Limited
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.
Cal-IPC Newsletter Articles
- Protecting San Diego wetlands. Cal-IPC. Vol 24, Issue 1
- Wildland Weed News. Cal-IPC. Vol 22, Issue 2
- Don’t sell a pest: A new partnership to prevent plant invasions through horticulture. Connick, Sarah; Gerel, Mike. Vol 13, Issue 2
- Roundup of Arundo projects reveals commitment, strategic weakness. Kelly, Mike. Vol 07, Issue 2
Cal-IPC Symposium Presentations
- Connick, S. and M. Gerel (2004). Partnering to prevent invasions of plants of horticultural origin. California Invasive Plant Council Symposium 2004. Ventura, CA.
Other Iris pseudacorus Information
- CalPhotos - Images of plants taken mostly in California.
- CalFlora - Distribution information based on submitted observations and herbarium specimens.
- 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.