Annual herb, erect with ascending branches, up to 40 cm high; indumentum of curved hairs. Leaves linear, 12–58 mm long, 1–5 mm wide; apex acute to rounded, mucro 0.2–0.3 mm long; petiole 0–1 mm long. Inflorescence supra-axillary or leaf opposed, a raceme to 200 mm long, exceeding the leaves, well past the leaves at the top of the plant. Pedicel 2 mm long. Alae perpendicular to deflexed in fruit (position), herbaceous, narrowly elliptic to oblanceolate, slightly dimidiate to falcate, 3.0–4.5 mm long, 1–2 mm wide, with curved hairs. Corolla purple; floral appendages fimbriate; upper petal claw 1 mm wide. Stamens terminate at stigma, monadelphous; staminal flap c. 0.7 mm wide. Style distinctly hooked (horseshoe-shaped at apex), ± terete, with flat stigma along inner surface of hook. Capsule perpendicular or deflexed, occasionally reflexed (apex of alae diverging c. 30° from capsule), lacking wing, ± symmetrical, oblong to squarish, 3.5–4.5 mm long, 2.7–3.4 mm wide; lobe apices rounded and separated. Seed ovoid–obloid, 3.5–4.0 mm long, 1–2 mm wide, with indumentum of fine white hairs. Aril head hooked, 0.6–0.8 mm long, white and brown with a tuft of hairs. Aril appendages 3, oblong to linear, 0.8–0.9 mm long.
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