- Senecio linearifolius
Key to the varieties of Senecio linearifolius
1Lower surface of mature leaves woolly (surface largely to entirely obscured); leaves lacking auricles or auricles present only on uppermost leaves and very small and entire2 1Lower surface of mature leaves glabrous or slightly to moderately cobwebby (surface only moderately obscured); leaves often with prominent and/or divided auricles3 3Plants not glaucous; lower surface glabrous or indumentum cobwebby (hairs not multicellular and spreading); widespread4 4Margin of stem leaves commonly entire, sometimes callus-denticulate, revolute; l:w ratio of upper-stem leaves 5–30; lower surface of leaves with secondary veins not or only slightly raised; tertiary venation not usually discernibleSenecio linearifolius var. linearifolius 4Margin of stem leaves denticulate to dentate, commonly not or hardly recurved; l:w ratio of upper-stem leaves 1.5–15; lower surface of leaves with secondary veins commonly distinctly raised; tertiary venation usually discernible5 5Leaves to 20 mm wide; upper-stem leaves with l:w ratio 4–15, with base (excluding auricular segments) attenuate to cuneate; auricles consisting of segments almost discontinuous with lamina; teeth frequency along margin of leaves 1–3 per cm; sea-level to montaneSenecio linearifolius var. denticulatus 5Leaves to 50 mm wide; upper-stem leaves with l:w ratio 1.5–6, with base broad-cuneate to cordate; auricles typically continuous with lamina; teeth frequency along margin of leaves 3–5 per cm; montane to alpineSenecio linearifolius var. latifolius From: Thompson, I.R (2004b). Taxonomic studies of Australian Senecio (Asteraceae): 2. The shrubby, discoid species and the allied radiate species Senecio linearifolius.. Muelleria 20: 67–110.