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Species profile—Senecio daltonii (dalton weed)

Classification

Plantae (plants) → Equisetopsida (land plants) → Asteraceae (sunflower) → Senecio daltonii (dalton weed)

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Species details

Kingdom
Plantae (plants)
Class
Equisetopsida (land plants)
Family
Asteraceae (sunflower)
Scientific name
Senecio daltonii F.Muell.
Common name
dalton weed
WildNet taxon ID
10436
Nature Conservation Act 1992 (NCA) status
Least concern
Back on Track (BoT) status
Medium
Conservation significant
No
Confidential
No
Endemicity
Native
Pest status
Nil
Short Notes
BRI 365944
Description
Senecio daltonii is a perennial herb with an extensive root system, growing 10-50cm high. The leaves are oblanceolate, narrowly elliptic or linear, 3-10cm long, 2-15mm wide and narrowing at both ends. The leaf margins are entire or sometimes irregularly toothed and the leaf surface is hairless or sparsely hairy. The leaf stalks are up to 30mm long and sometimes absent.
The flower clusters contain 1-3 flower heads. The heads are bell-shaped (campanulate), 10-15mm in diameter and more or less cobwebby. There are 16-20 involucral bracts surrounding each head;bracts are 10-15mm long. There are about 12 yellow ray florets - the outer flowers of the flower heads. The petal-like structure of each ray floret is about 10mm long. The small, dry, one-seeded fruits (achenes) are 4-5mm long and almost hairless, with a tuft of 10-15 mm long hairs at the apex (pappus).
The genus Senecio is distinguished by the involucral bracts which are always in one row. S. daltonii is the only Senecio species in the area that has large flower heads more than 1 cm long. (Harden 2008; Stanley & Ross 1986).
Distribution
Senecio daltonii is found from Biloela in Queensland south to Forbes in New South Wales and is also found in Victoria. In Queensland, it occurs mainly on the Darling Downs, as far west as Brewarrina. (Harden 2008; Herbrecs 2008).
Distributional limits
-24.4984152, 149.5010934
-28.2484079, 152.0844201
Range derivation
Range derived from extent of the taxon's verified records
Habitat
Senecio daltonii grows on heavy soils and is often found in areas of cultivation. (Harden 2008).
Behaviour
Little is known on the ecology of the species. It is usually found in cultivated areas and therefore is likely to require some degree of disturbance for effective reproduction. (Harden 2008).
Reproduction
Senecio daltonii flowers predominantly in autumn (Harden 2008).
Notes
Contributors: Ailsa Holland 11/10/2009; Danielle Hansen 16/10/2009.
References
Harden, G.J. (2008). Senecio daltonii, in PlantNet - The Plant Information Network System of Botanic Gardens Trust, Sydney, Australia. Accessed 29/10/2008. http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Senecio~daltonii.
Herbrecs (2008). Senecio daltonii, in BriMapper version 2.12. Queensland Herbarium. Accessed 29/10/2008.
Stanley, T.D. & Ross, E.M. (1986). Flora of South-eastern Queensland Volume 2: 576.
Profile author
Danielle Hansen (16/10/2009)

Other resources

The Australasian Virtual Herbarium (AVH)
Atlas of Living Australia

Data source

This profile data is sourced from the QLD Wildlife Data API using the Get species by ID function used under CC-By 4.0
https://apps.des.qld.gov.au/species/?op=getspeciesbyid&taxonid=10436

This information is sourced from the WildNet database managed by the Queensland Department of Environment and Science.

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Licence
Creative Commons Attribution 4.0 International (CC BY 4.0)
Last updated
7 September 2021
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