The New Zealand Plant Conservation Network

A good friend, holidaying in the Waianakarua district of coastal Otago, has asked for help in identifying the colourful creeper that she found on the banks of the north branch of the Waianakarua River at the New Year weekend. We are both keen to know what it is, (believing it to be introduced), and whether it constitutes any significant threat to our native flora?

The characteristics of the plant and its flowers closely resemble those of the Network's description of Tropaeolum speciosum - the "Chilean flame creeper". We are still concerned to know about any potential ecological threat. If you have information to help, we would be most grateful to know more.

Ooops!! Environment Canterbury has published a .pdf about Tropaeolum speciosum, which indicates that the creeper will "climb to canopy levels, smothering existing vegetation and blocking light from reaching
the forest floor. With no light, it becomes difficult for native seedlings to regenerate. Birds also spread the seeds to remote areas where Chilean flame creeper becomes difficult to control. Chilean flame creeper is classed as an unwanted organism
and is on the National Pest Plant Accord list. This means it cannot be sold, distributed or propagated within New Zealand. Unfortunately it is extremely hard to kill and requires ongoing follow-up work."

Hi Geoff, yes it is Chilean flame creeper. This is a problem in several places in the Catlins and Coastal Otago where it can form a blanket over trees. There was a programme to try and clear it from a reserve near Kaka Point, but I think they found it very difficult to remove and I don't know if the programme is still continuing. You might be successful if the infestation is light and there are no nearby heavy infestations. Have a look around and good luck!

Thank you, Mike, for your comments and support. This is clearly a significant pest and thankfully the Waianakarua outbreak seems to be relatively confined in the "Queen's chain" from the river. We'll do our bit and also alert the local Council.