Caltha palustris

Marsh Marigold at Crace, ACT

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Identification history

	Caltha palustris	26 Sep 2016	MichaelMulvaney
	Unidentified	26 Sep 2016	walter

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User's notes

growing in seep below water tank at Gungahlin Hill . This plant is Caltha palustris, (Ranunculaceae ) not recorded before on nature map

7 comments

walter wrote:

27 Sep 2016

I saw this growing in a seepage area below the tanks on Gungahlin Hill.
I identified it using pictures from a wildflower book of the UK flora.
Common name is meadow marigold
As far as I know, it is not recorded before in the ACT

MichaelMulvaney wrote:

27 Sep 2016

Thanks Walter, Marsh Marigold is considered to have a reasonably high weed potential and this appears to be the first naturalised record of the plant in the ACT. It is one that we will get onto and try and eradicate. Steve would be worth taking a herbarium specimen, for definitive ID. Thanks again for alerting us to the presence of this plant Walter

walter wrote:

27 Sep 2016

Thanks Michael. The plant is on the north-west slope below the tank - easily accessible from a style over the fence on the Crace boundary. - off Drooka Crescent.

ACTBioSecurity wrote:

27 Sep 2016

Has material been taken to the herbarium so they can have an official record for their plant census? If not I will collect some this week. Seems wise we eradicate.

ACTBioSecurity wrote:

27 Sep 2016

There is a look-a-like from Europe that is an invasive weed in North America - lesser celandine or pilewort (Ficaria verna). It outcompetes the North American native, marsh marigold. Lesser Celandine is recorded as naturalised at only at one location in SE Australia, at Lake Wendouree, Ballarat, according to Weeds Of The South East 3rd Edition.

ACTBioSecurity wrote:

28 Sep 2016

Flowers removed today on advice from herbarium - as potential for spread of marsh marigold is high. Will commence control/removal this week.

MichaelMulvaney wrote:

28 Sep 2016

Thanks Steve, really appreciate the prompt action that you have taken in response to Walter's posting

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