Boneseed (Chrysanthemoides monilifera ssp. monilifera) is a large perennial shrub and an environmental weed that has the potential to threaten natural ecosystems and spread throughout the south-west and surrounding areas if allowed to establish. It is a declared pest in Western Australia and also a Weed of National Significance. Several infestations around Perth and in the south-west are being monitored and are currently under eradication.
What to look for
- large perennial evergreen shrub up to 3 metres high, erect and densely branched
- bright yellow flower clusters appear August to October on branch tips of large shrubs, daisy-like with 4 to 8 petals (can be up to 13)
- leaves are dull green, smooth, irregularly serrated
and paddle-shaped with tufts of cottony-down on
new growth - fruit are round, fleshy berries in clusters of up to 8, appearing during September to November, ripening green to black and contain one seed
- seeds are smooth, very hard (bone-like), germinates mainly in autumn if adequate soil moisture is present
- may also be confused with flowering native buttercups, bitou bush, native boobialla, African veldt daisy and flax-leaf broom bush.
Key points
- If found, report it.
- Seedlings are shallow-rooted and easily hand-pulled, mature plants can be dug up.
- Collect and bag-up any fruit or seeds (on plant or ground) for disposal.
- Movement is prohibited. Leave weeded plants to die where found to prevent spread.
Report Boneseed detections
Report suspected detections of Boneseed to either:
- Pest and Disease Information Service (PaDIS)
+61 8 9368 3080 | Email padis@dpird.wa.gov.au - MyPestGuide Reporter app or online tool.