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Medium_pc190485 Can you please identify this plant?

It's growing in full sun & approx 2 - 3 metres high. The cut stem has very sticky milky sap. The green tennis like balls have prickly hairs on them & the seeds are inside.

Submitted: 05:20PM, 19 Dec 2015
Answer: Hi Sue,

Thankyou for this great little I.D. challege. Your description and photo clearly showing leaf and fruit shape along with mature flowers really helped the process along.

What you have there is a sample of Gomphocarpus physocarpus,
Commonly known in your area as the Balloon Cotton Bush.
It is very closely related to the Narrow Leaf Cotton Bush (Gomphocarpus fruticosus), which is a declared pest in Western Australia; so I wouldn’t be surprised if it shares some degree of invasiveness. A perhaps more pleasant characteristic it shares with its declared cousin is that it is a host plant to the Wanderer Butterfly (Danaus plexippus).

Thanks again and happy gardening!

Kind regards,

Matt
Yates Consumer Advice Horticulturalist

Category: Weeds
Tags: weeds
Answered: 09:21AM, 23 Dec 2015

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