1	"Lower surface of mature leaves woolly (surface largely to entirely obscured); leaves lacking auricles or auricles present only on uppermost leaves and very small and entire"	2
1	"Lower surface of mature leaves glabrous or slightly to moderately cobwebby (surface only moderately obscured); leaves often with prominent and/or divided auricles"	3
2	"Hairs on lower surface of leaves basally coarse, multicellular and spreading; florets per capitulum 20–30"	"Senecio linearifolius var. graniticola"
2	"Hairs on lower surface of leaves entirely fine; florets per capitulum 16–20"	"Senecio linearifolius var. gariwerdensis"
3	"Plants slightly glaucous; lower surface of leaves with scattered, spreading, rather weak multicellular hairs; Suggan Buggan area"	"Senecio linearifolius var. intermedius"
3	"Plants not glaucous; lower surface glabrous or indumentum cobwebby (hairs not multicellular and spreading); widespread"	4
4	"Margin 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 discernible"	"Senecio linearifolius var. linearifolius"
4	"Margin 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 discernible"	5
5	"Leaves 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 montane"	"Senecio linearifolius var. denticulatus"
5	"Leaves 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 alpine"	"Senecio linearifolius var. latifolius"