Senecio madagascariensis

Madagascan Fireweed, Fireweed at O'Malley, ACT

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Identification history

	Senecio madagascariensis	12 Oct 2016	BettyDonWood
	Senecio madagascariensis	12 Oct 2016	Mike

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7 comments

Mike wrote:

13 Oct 2016

Maybe I need a refresher but this looks like fireweed to me.

ACTBioSecurity wrote:

13 Oct 2016

Agree - see the stem clasping leaves with well spaced toothed margin. Leave size right. Petal number in correct number range. If around 20 bracts too - confirmed. Remove before seeding and map treatment site on Collector app Treated Weeds please.

Mike wrote:

13 Oct 2016

Photo of buds added.

BettyDonWood wrote:

13 Oct 2016

It is essential that you count the bracts. The only obvious diferrence between it and some forms of Senecio pinnatifolius (var. alpinus in the ACT) is the number of bracts around the flower head. http://keyserver.lucidcentral.org/weeds/data/media/Html/senecio_madagascariensis.htm

ACTBioSecurity wrote:

13 Oct 2016

Yes Mike - please check bract number asap - as if fireweed needs to be removed quickly

Mike wrote:

13 Oct 2016

Found another one when I went back to get a close-up and count. Thirteen ray florets (petals) and 21 green bracts.

Mike wrote:

13 Oct 2016

Two plants removed. Had not reached seed stage. Reported on Collector so the site can be monitored.

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