What is creeping yellowcress?(Rorippa sylvestris)
- Creeping yellowcress is a native of Europe, West
Asia and North Africa. It is known to be a weed of horticulture and
- Creeping yellowcress is a declared weed in Tasmania under the Tasmanian Weed Management Act 1999. The importation, sale and distribution of creeping yellowcress are prohibited in Tasmania.
How to identify creeping yellowcress
yellowcress is a perennial (long-lived) herb with a mat-forming habit.
The stems are erect and branching from the base, and grow to 70 cm high.
The leaves are dark green and divided into fine toothed lobes. The
flowers are bright yellow and the fruit is three times longer than wide
and has a short beak. Creeping yellowcress has an extensive spreading
system of rhizomes (underground stems).
- Spread is via rhizomes
and rhizome fragments; fertile seed is not produced. Rhizome fragments
can be spread in contaminated soil, on machinery and in horticultural
Image top right: Creeping yellowcress flowering plant, photo: Christian Goninon
Image above: Creeping yellowcress infestation, photo: Christian Goninon
Creeping yellowcress in Tasmania
yellowcress has been detected as a weed of several ornamental bulb
enterprises in southern Tasmania, and the weed has been recorded as
naturalised in the Huon Valley municipality. It has also been recorded
in South Australia.
- It can be an extremely persistent weed.
Rhizomes intertwine with the roots of desired plants and selective
control is very difficult. Experience in the United States, where
creeping yellowcress has spread along riparian areas indicates its
potential to impact upon natural areas.
What you need to do
- If you locate
creeping yellowcress anywhere in Tasmania, or if you find a plant that
you think could be creeping yellowcress, immediately contact your
Regional Weed Management Officer on 1300 368 550 to report this weed.
- Control of creeping yellowcress will depend on the situation where it occurs. Contact DPIPWE to discuss control options.
What is the legal status of creeping yellowcress in your area?
Creeping Yellowcress Statutory Weed Management Plan
Weed Links and Resources
Other useful links
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