What is Bathurst burr?(Xanthium spinosum)
How to identify Bathurst burr
Image top right: Bathurst burr - fruiting branch (Image: Robin Knox)
- Bathurst burr is a branching, perennial (long-lived) plant growing to a height of about 80 cm.
stems and lower surface of the leaves are covered with white woolly
hairs, giving the plant a silvery appearance. The leaves have a
"crinkly" appearance and the leaf margins have rounded teeth. The white
flower clusters are densely packed, forming balls of flowers that
surround the upper stems at each leaf node.
- Most seed
germinates after autumn rains but some germination also occurs through
winter into spring. Established plants flower over several months during
summer and autumn and new growth is produced each year in autumn and
- For help in identifying Bathurst burr, search the Dennis Morris Weeds and Endemic Flora Database
for Bathurst burr illustrations. If you are still in doubt about the
weed you are dealing with, contact your Regional Weed Management Officer
on 1300 368 550 for help.
Image above: Bathurst burr - whole plant (Image: Karen Stewart)
Burr species in Tasmania
- Burr species (Xanthium spp.) have the capacity to grow throughout much of Tasmania. Burrs are most troublesome in grazing areas. Infestations occur on roadsides, waste areas, stockyards, dry banks, near farm buildings and on the site of old homesteads.
- Bathurst burr, one of the more serious burr species, is not widely recorded and is a target for eradication.
- Bathurst burr can contaminate sheep and goat fleeces by its dry fruits (or burrs), leading to significant losses in fleece value due to matting.
- Bathurst burr is also an important environmental weed due to its ability to invade disturbed native vegetation.
What is the legal status of Bathurst burr in your area?
The legal responsibilities of landholders and other stakeholders in dealing with Bathurst burr are laid out in the burrs Statutory Weed Management Plan
Use Table 1 (Zone A municipalities) in the Statutory Weed Management Plan to find out whether this weed occurs in your municipality.
Detailed management and control guidelines for Bathurst burr can be found in the Bathurst Burr Control Guide
. Refer also to Herbicides for Bathurst Burr Control
. For further information see DPIPWE's Weed Links and Resources
Bathurst Burr Control Guide
Burrs Statutory Weed Management Plan
Bathurst Burr - Herbicides for Control
Weed Links and Resources
Other useful links
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