Annual herb, erect with ascending branches, up to 40 cm high; indumentum of curved hairs, rarely with a few straight hairs. Leaves linear, 12–66 mm long, 1.5–5.0 mm wide; apex acute, obtuse, mucro c. 0.5 mm long; petiole 0–1 mm long. Inflorescence supra-axillary or leaf-opposed, a raceme to 90 mm long, exceeding the leaves, but generally not extending past leaves at the top of the plant. Pedicel 3 mm long. Alae perpendicular and deflexed in fruit (position), herbaceous, elliptic to ovate, slightly dimidiate to falcate, 3.5–6.0 mm long, 1.0–3.9 mm wide, with curved hairs. Corolla purple; floral appendages fimbriate; upper petal claw 1 mm wide. Stamens terminate at stigma, monadelphous; staminal flap 1 mm wide. Style distinctly hooked (horseshoe-shaped at apex), ± terete, with flat stigma on inner surface of hook. Capsule deflexed, occasionally some reflexed, ± aligned with alae or apex of alae slightly diverging from capsule, lacking wing, ± symmetrical, oblong to squarish, 4.25–5.00 mm long, 3–4 mm wide; lobe apices rounded and separated. Seed ovoid-obloid, 3.75–4.00 mm long, 1.50–1.65 mm wide, with indumentum of fine white becoming ferruginous hairs. Aril head hooked to round, 0.50–0.65 mm long, white or white and brown, with a tuft of hairs. Aril appendages 3, oblong to linear, 1.0–1.5 mm long.
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