What is boneseed?(Chrysanthemoides monilifera ssp. monilifera)Boneseed (Chrysanthemoides monilifera ssp. monilifera) is a serious environmental weed. Boneseed is a declared weed under the Tasmanian Weed Management Act 1999. The importation, sale and distribution of boneseed are prohibited in Tasmania.Boneseed is also a Weed of National Significance (WONS).
How to identify boneseed
- Boneseed is an
evergreen woody shrub growing to 2 metres or more in height and width.
The elongated leathery leaves are dull green in colour and around 40 to
70 mm long and 20 to 35 mm wide.
- Boneseed flowers from
mid-spring to early summer. The yellow flowers develop in clusters at
the ends of the branches and resemble the flowers of a daisy. The fruits
are green and fleshy at first then becoming black at maturity. The
fruit eventually flakes off to leave the inner seed exposed.
seeds are hard and bone-like in texture and colour. Seeds are shed
during summer and autumn. Heat may crack the seed coat and large numbers
of boneseed seedlings may appear after fire.
- For help in identifying boneseed, search the Dennis Morris Weeds and Endemic Flora database
for African boxthorn 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 top right: Boneseed flowers and fruit.
above, left to right: Seedling, photo: Greg Stewart, East Coast
Regional Weed Strategy Group; Paddock infestation, photo: TIA
Boneseed in Tasmania
- Boneseed is common
in several coastal areas of Tasmania, especially along the north coast
east of Wynyard and on parts of the east coast (see map).
Boneseed is common in the Tamar Valley and in and around Hobart.
Elsewhere in Tasmania boneseed occurs occasionally as a weed of
disturbed bushland and coastal vegetation.
- Boneseed can
invade the understorey of native forests and bushland, and is
particularly invasive in coastal areas. Boneseed competes with native
plants and reduces biodiversity, and dense infestations can be a
significant fire hazard.
What is the legal status of boneseed in your area?The legal responsibilities of landholders and other stakeholders in dealing with boneseed are laid out in the boneseed Statutory Weed Management Plan.
Use Table 1 (Zone A municipalities) and Table 2 (Zone B municipalities) in the Statutory Weed Management Plan to find out whether your area falls in an eradication or containment zone.
Detailed management and control guidelines for boneseed can be found in the Boneseed Control Guide. Refer also to Herbicides for Boneseed Control. For further information see DPIPWE's Useful Resources: Weeds.
Boneseed Control Guide
Herbicides for Boneseed Control
Statutory Management Plan for Boneseed
DPIPWE's Useful Resources: Weeds
Other useful links
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