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Erect subshrub to c. 0.6 m high. Leaves undivided or occasionally deeply lobate, 3–10 cm long, generally thin following pressing; base of upper-branch leaves sometimes becoming dilated above mid-stem; margin regularly denticulate or callus-denticulate; undivided leaves with l:w ratio c. 6–20; lobate leaves with 1 or 2 segments per side. Capitula few to several per branch; calycular bracteoles 8–12, 1.5–2 mm long, 0.5–0.8 mm wide, acute to peracute; involucre 4–6 mm long, 3–5 mm diam.; bracts c. 20; broader stereomes of inner bracts 0.5–0.8 mm wide. Ligulate florets c. 13; ligule 5–10 mm long. Achenes 1.5–2.2 mm long, c. ⅖ length of involucral bracts, brown, with papillose hairs obscuring 20–50% of surface; receptacular attachment areas homomorphic. Pappus not persistent, 3–5 mm long.
Annual herb, up to 0.3 m high, ± glabrous. Stems leafy, often simple below, branching above. Leaves very variable, up to 120 x 25 mm, mostly linear-to elliptic-lanceolate, base petiole-like, half-clasping, sometimes ± eared, apex acute, margins denticulate to pinnately lobed. Inflorescence paniculate. Capitula few-many, radiate, disc and rays canary yellow, rays ± 13, often rolled under; involucre campanulate; bracts ± 20, 4-6 mm long, resinous; calyculus bracts few, small. Flowering time all year. Cypselae cylindrical, 1.5-2.0 mm long, hispid between ribs.
Glabrous or very sparsely hairy annual herb, up to 300 mm tall. Heads radiate, rays 13; involucral bracts 20, 4-5(-6) mm long. Ovaries and achenes hispid between ribs. Flowers canary-yellow; September to November and in February and May.
Resembles S. mesogrammoides, but the leaf midrib is scabrid, while the leaves are glabrous otherwise; and the number of phyllaries is higher (± 20–29).
A herb. It keeps growing from year to year. It grows 1 m tall. The leaves are 4-8 cm long by 3-12 mm wide.
