Senecio dolichocephalus I.Thomps.

Mallee Fireweed

Muelleria 19: 167 (2004) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: data deficient (k)

Erect annual herb to 60 cm high; stems often woolly basally, appressed-cottony to mid-way up stem, sparsely cottony or ± glabrous mid-way up stem to apex. Leaves sessile, not dissected or occasionally coarse-dentate to lobate, with remotely denticulate or dentate margins. Mid-stem leaves attenuate at base, oblanceolate to narrow-elliptic, 3–12(–15) cm long, 2–15 mm wide; upper surface scabridulous, sometimes transiently sparsely cobwebby also, becoming glabrous upwards; lower surface usually purple, coarse-hairy, often with a weak cobwebby overlay. Upper leaves sometimes auriculate, narrow-linear; upper surface ± glabrous, cobwebby, sometimes very sparsely coarse-hairy; lower surface cobwebby. Inflorescence corymbose, typically with 20–60 capitula; capitula non-radiate; involucre narrowly cylindric, 8.5–12.0 mm long, glabrous; bracts 12–14; bracteoles present; florets 40–60, bisexual and female. Cypselas weakly lageniform, 3.0–4.0 mm long, reddish or brown, sometimes green, papillose-hairy in lines; pappus of slender hairs 7–9 mm long, deciduous. Flowers spring–summer.

Gold, LoM, MuM, NIS, Wim. Also WA, SA. In Victoria in the north-west in sandy soil in woodlands and shrublands.

This species is somewhat intermediate in morphology between Senecio quadridentatus and S. phelleus (Thompson 2004a). The capitula are much longer than in S. phelleus and at the higher end of the range for S. quadridentatus (Thompson 2004a). As in S. phelleus, the leaves tend to be broader and relatively crowded basally (Thompson 2004a).

Created by: Daniel Ohlsen, 2015-09-18
Updated by: Val Stajsic, 2019-11-26
 
References

Thompson, I.R. (2004a). Taxonomic studies of Australian Senecio (Asteraceae): 1. The disciform species, Muelleria 19: 101-214.

Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Asteraceae
genus Senecio
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Senecio dolichocephalus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Senecio dolichocephalus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Goldfields present native
Northern Inland Slopes present native

State distribution

Distribution map
State
Western Australia
South Australia
New South Wales
Victoria