Tree to 4 m or rarely a thick-trunked mallee. Forming a lignotuber.Bark rough to the small branches, deeply tessellated, brown to yellow brown.Branchlets lack oil glands in the pith; younger branchlets conspicuously setose with bristle-glands; branchlets occasionally whitish.Juvenile growth (coppice or field seedlings to 50 cm): stems rounded in cross-section, setose; juvenile leaves opposite and sessile, cordate, 3.8–7.8 cm long, 1.7–3.3 cm wide, stem-clasping or lobed, green, scabrid. Crown of juvenile leaves, opposite, sessile or very shortly petiolate (to only 0.2 cm long); blade cordate or rarely almost elliptical-oblong, (1.5)2.7–7.7 cm long, 1–5 cm wide, base amplexicaul, margin entire, apex pointed or rounded and apiculate, concolorous, dull, light green to grey-green or yellow-green, smooth or slightly scabrid with the remains of short bristle-glands, side-veins at a wide angle to the midrib (penniveined), reticulation very dense, intramarginal vein present, oil glands apparently absent.Inflorescence terminal compound, peduncles rounded or angled, 0.3–2.5 cm long, buds 3 or 7 per umbel, pedicels 0.3–1(1.5) cm long. Mature buds pyriform, 0.6–1.2 cm long, 0.5–0.7 cm long, conspicuously setose with long and short bristle-glands, scar absent (both opercula shed together at flowering), operculum beaked or, rarely, rounded, stamens inflexed, all fertile, anthers versatile, dorsifixed, oblong, dehiscing by longitudinal slits, style long and straight, stigma blunt with a fringe of papillae, locules 4, vertical ovule rows indistinct on the placentae. Flowers white.Fruit pedicellate (pedicels 0.1–1.2 cm long), urceolate to truncate-globose, often with a neck but the neck not flared outwards, 1.1–2.8 cm long, 1.1–2.5 cm wide, surface rough, disc descending vertically, valves 4, enclosed.Seeds brown, 8–13 mm long, ellipsoidal with terminal wing, hilum ventral. Cultivated seedlings (measured at ca node 10): cotyledons large, reniform; stems rounded in cross-section, setose with bristle-glands of variable length; leaves sessile or shortly petiolate (petioles to 0.2 cm), opposite, cordate to ovate, 3.8–6.1 cm long, 1.7–3.3 cm wide, base amplexicaul to rounded, apex pointed to rounded, scarcely discolorous, dull, mid-green, shortly setose with bristle-glands that may bear simple hairs or papillae, or lack these.
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Tree mostly to 6 m, sometimes to 9 m, straggly. Bark rough, flaky or tessellated, grey throughout. Juvenile leaves similar to, but smaller than leaves on mature trees. Leaves on mature trees opposite, sessile, lanceolate to broadly ovate, cordate, 5–10 cm long, 2.5–6 cm wide, sometimes scabrous, grey-green; lateral veins at 55°–75°, curved towards margin. Umbels 3–7-flowered; peduncle 12–25 mm long, setose; pedicels 4–8 mm long, setose. Buds ovoid to pyriform; operculum hemispherical-conical, 5–7 mm long, 7–8 mm wide; hypanthium truncate-ovoid, 9–11 mm long, 7–8 mm wide. Fruits pedicellate, ovoid to suburceolate, 15–25 mm long and wide, woody, setose when young, becoming smooth. Seeds winged at one end, yellow-brown.
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