Annual herb, erect with ascending lateral branches, rarely sprawling, up to 30 cm high; indumentum of curved and straight hairs. Stems and leaves occasionally tinged maroon. Leaves linear, narrowly elliptic, elliptic or ovate, 4.5–6.5 mm long, 2.5–9.0 mm wide; apex acute or obtuse, mucro 0.2–0.3 mm long; petiole 0–2 mm long. Inflorescence supra-axillary or axillary, a raceme to 160 mm long, not exceeding the leaves and scorpioid. Pedicel to 3.5 mm long (4.5 mm in capsule). Alae antrorse to perpendicular in fruit (position), herbaceous, lanceolate or narrowly elliptic to elliptic, usually dimidiate, 3.6–6.4 mm long, 1.2–2.6 mm wide, often with straight hairs on margin and curved hairs on outer surface. Corolla purple; keel petal with slightly developed pocket; floral appendages fimbriate; upper petal claw 0.6–1.0 mm wide. Stamens terminate at stigma, monadelphous; staminal flap c. 0.6 mm wide. Style hooked (horseshoe-shaped at apex), terete at base, thickened in middle and becoming dorso-ventrally flattened below hook, twisting in apical half, with flat stigma along inner surface of hook. Capsule antrorse to perpendicular, rarely becoming reflexed, ± aligned with alae, lacking wing, widely elliptic to widely oblong, 4.4–5.5 mm long, 2.5–3.5 mm wide; lobe apices rounded and separated. Seed ovoid–obloid, 3.25–4.20 mm long, 1.1–1.8 mm wide, with indumentum of fine white becoming ferruginous hairs. Aril head hooked to helmet-shaped, 0.5–1.0 mm long, white or white and brown, with fine short hairs. Aril appendages 3, oblong, 0.5–1.0 mm long.
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