Senecio glastifolius L.f.

• an upright and short-lived, or more commonly long-lived, herbaceous plant growing up to 2 m tall.
• its much-branched stems are mostly hairless with fine ridges running lengthwise.
• its stem-clasping leaves (3-15 cm long) have sharply-toothed margins and resemble holly leaves.
• its daisy-like flower-heads have 12-22 pink or purple 'petals' surrounding a yellow centre.
• its brown 'seeds' (2-2.5 mm long) are initially topped by a ring of whitish hairs 7-9 mm long.

[From: Environmental Weeds of Australia]