Senecio pinnatifolius var. lanceolatus (Benth.) I.Thomps.

Muelleria 21: 49 (2005) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Erect or sometimes sprawling herb to 1.5(–2) m high, with tap-root poorly developed. Mid-stem leaves mostly lanceolate to oblanceolate (rarely oblong-elliptic or broadly ovate or obovate), 3–15 cm long, undivided to bipinnatisect, thin to subfleshy, or succulent on coast. Peduncles glabrous or with long hairs; involucre 4.0–7.0 mm long; bracts mostly c. 13, with apex purple; stereome slightly fleshy, succulent in coastal plants, delimited by a well-developed purple line towards the apex in inner bracts that have both lateral margins overlapped by outer bracts; bracteoles 6–14, ovate to narrow-ovate, 2.0–3.5 mm long, 0.8–1.6 mm wide, with margin often coarse-hairy. Cypselas (1.6–)2.0–3.2 mm long; hairs of cypselas of ray florets exceeding pappus-ring or not. Flowers Aug.–Mar.

Brid, CVU, EGL, GipP, Glep, Gold, GGr, HNF, HSF, OtP, OtR, Strz, VAlp, VRiv, VVP, WaP, WPro. Also SA, NSW, Tas. Widespread in forest, woodlands, shrubland, as well as edges of lakes or dry lake beds throughout the south of the state extending north to the Grampians and the alps.

The involucral bract morphology of this variety of Senecio pinnatifolius allows it to be distinguished from other varieties. The outer involucral bracts have markedly narrower hyaline margins than the inner bracts. The inner involucral bracts have the stereome bordered by a purple line in the apical quarter which creates a distinctive chevron (often just discernible with the naked eye). Some bracts are bordered by a purple line along the apical quarter on one side only and represent an intermediate condition between outer and inner bracts. The purple coloration is confined to the apex in the outer bracts and does not form a border. Leaf dissection is highly variable. The commonest form has lanceolate leaves with regularly serrate margins. However, dissection may vary from deeply bipinnatisect to quite entire (particularly along coasts). There is also variation in capitulum and cypsela morphology with a form with relatively small capitula occurring in south-west Victoria and a form with glabrous or sparsely hairy cypselas occurring on lake shores in the south-west and in higher rainfall areas east of Melbourne (Thompson 2005).

Created by: Daniel Ohlsen, 2015-10-30
Updated by: Val Stajsic, 2018-12-11
 
References

Thompson, I.R. (2005). Taxonomic studies of Australian Senecio (Asteraceae) 5. The S. pinnatifolius/S. lautus complex., Muelleria 21: 23-76.

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Distribution map

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Senecio pinnatifolius var. lanceolatus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Senecio pinnatifolius var. lanceolatus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
East Gippsland Lowlands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Strzelecki Ranges present native
Victorian Alps present native

State distribution

Distribution map
State
South Australia
New South Wales
Victoria
Tasmania