Madagascan Fireweed, Fireweed at Braddon, ACT
Identification history
| Senecio madagascariensis | 18 Oct 2019 | MichaelMulvaney | ||
| Senecio madagascariensis | 17 Oct 2019 | Mike |
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Significant sighting
User's notes
Maybe I am just suspicious about stray daisies.
4 comments
BettyDonWood
wrote:
18 Oct 2019
One of the diagnostics of Senecio madagascariensis is the number of bracts on the flower head behind the ‘petals’ - 19-21. The local yellow Senecio, pinnatifolius var. alpinus, which I would expect at altitudes much higher than Canberra, has about 13, but sometimes about 20 bracts.
The character the Vicflora key to Senecio uses to separate madagascariensis from pinnatifidus: madagascariensis - bracteoles not or barely overlapping the base of the involucre; neither bracts nor bracteoles conspicuously black-tipped; cypselas (seeds) 1.5-2.2 mm long, 0.3-0.5 mm diameter. Pinnatifolius: bracteoles overlapping the base of the involucre; bracts and bracteoles conspicuously black-tipped; cypselas (seeds) 1.6-4.5 mm long, 0.5-0.8 mm diameter.
The character the Vicflora key to Senecio uses to separate madagascariensis from pinnatifidus: madagascariensis - bracteoles not or barely overlapping the base of the involucre; neither bracts nor bracteoles conspicuously black-tipped; cypselas (seeds) 1.5-2.2 mm long, 0.3-0.5 mm diameter. Pinnatifolius: bracteoles overlapping the base of the involucre; bracts and bracteoles conspicuously black-tipped; cypselas (seeds) 1.6-4.5 mm long, 0.5-0.8 mm diameter.
Mike
wrote:
18 Oct 2019
More likely to be an invasive plant making its way down the tram tracks from Gungahlin. I don't know if I can get back to count the bracts or look for black tips. If it is the invasive one I don't want to see the seeds.
MichaelMulvaney
wrote:
19 Oct 2019
City Services has/is taking action on removing this plant. Steve Taylor also passed on the tip that
Firewwed ‘usually’ has 13 to 15 ray florets (but can be more) and has 19-21 involucral bracts and 8 – 12 bracteoles http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Senecio~madagascariensis
Firewwed ‘usually’ has 13 to 15 ray florets (but can be more) and has 19-21 involucral bracts and 8 – 12 bracteoles http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Senecio~madagascariensis
Location information
- Coordinates 149.129722-35.275000
- Altitude 573.0m
- Maps City Renewal Authority Area
- Places Braddon, ACT
Sighting information
- At least 1 Abundance
- 17 Oct 2019 01:48 PM Recorded on
- Mike Recorded by
-
Collections
Significant Plants Daisies Mike Canberra & Southern Tablelands NatureMapr
Species information
- Senecio madagascariensis Scientific name
- Madagascan Fireweed, Fireweed Common name
- Not Sensitive
- Exotic
- Major weed or pest
- Up to 1000m Recorded at altitude
- 221 images trained Machine learning
-
In flower
- External link More information
Record quality
- Images or audio
- More than one media file
- Verified by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes
