Woody herb 0.4–1 m high, much branched, densely leafy in the distal parts; branches winged, scabrid, the wings narrow, entire or denticulate.. Leaves grey-green, aromatic, narrowly lanceolate to linear, 1–5.5(–9) cm long, 0.2–0.7(–1.9) cm wide, base decurrent into the wings, margins dentate to subentire, apex acute to obtuse and mucronate, scabrid and glandular.. Glomerules mauve or purple, terminal on the branches, globose to short-cylindrical, 7–20 mm long, 7–13 mm in diameter;peduncle 0.3–4 cm long, narrowly winged or ribbed, often with an aborted glomerule; receptacle ovoid to ellipsoid; glomerule bracts hidden at anthesis, the proximal linear to lanceolate, 3–4 mm long, hispidulous, the more distal similar to the capitulum bracts; capitula distinct in bud but becoming less so, on (very) short secondary receptacles, with 16–24 bracts, these narrowly elliptic to oblanceolate, 3–5 mm long, (spinulose-) acuminate, ciliate and pubescent distally.. Florets: outer florets many (20–50), tube filiform or slightly widened at the base and becoming corky, 2–2.4 mm long, lobes < 0.1 mm long, style 2.3–3 mm long; inner florets 5–11, tube narrowly infundibuliform, 2.1–3 mm long, becoming corky proximally, sparsely glandular, lobes 0.4–0.6 mm long, sparsely glandular, anthers 1.3–1.8 mm long, style 4–5 mm long, entire or very briefly lobed.. Achenes of outer florets 0.5–0.8 mm long, glabrous or with few hairs, of inner florets stipe-like, ?sterile, 0.3–0.5 mm long, glabrous.. Fig. 78/1–8 (page 376).
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