Black-eyed Susan
Acanthaceae - Thunbergia alata
BioSecurity

What does it look like?

A vine that can grow to a height of 1.8-2.4 m. It has twinning stems with heart or arrow-shaped hairy leaves. It favours sun to partial shade. Soft orange and black five-petal blooms appear in late Spring/early summer, mid summer and again in late summer, early autumn.  Black-eyed Susan is known for producing flowers as early as six weeks after germination. The leaves are heart shaped dicotyledons. 

Why is it a problem?

A garden escapee found growing down banks and smothering native vegetation. Prolific seeder in warmer areas of New Zealand.

Control Methods

Physical control

  • Can be hand removed and care needs to be taken to dig out all the roots. The green waste will probably need to be disposed of in an appropriate manner.

 

BioSecurity