Annual herb, erect with ascending branches, up to 30 cm high; indumentum of curved and straight, pubescent to hispidulous hairs. Leaves linear to oblanceolate, elliptic or obovate, 6–55 mm long, 1.5–11.0 mm wide; apex acute to rounded, mucro 0.2–0.6 mm long; petiole 0–1 mm long. Inflorescence supra-axillary or rarely axillary, a raceme, sometimes with a solitary flower on internode preceding raceme, to 40 mm long, usually not exceeding the leaves, sometimes longer. Pedicel to 2.5 mm long. Alae antrorse to perpendicular in fruit (position), herbaceous, lanceolate, falcate, 5.0–7.5 mm long, 1.3–2.4 mm wide, with curved and straight hairs or straight hairs only. Corolla purple; floral appendages succulent, bifid to 3–4 times forked; upper petal claw 1–1.5 mm wide. Stamens terminate at stigma, monadelphous; staminal flap c. 0.5 mm wide. Style straight to slightly curved, dorso-ventrally flattened, often hairy at base and always prominently grooved above globular stigma. Capsule perpendicular to slightly deflexed, ± aligned with alae, lacking wing, orbicular or widely ovate, 3.0–4.0 mm long, 3.0–3.8 mm wide; lobe apices obtuse to rounded and separated. Seed ovoid, 2.7–3.3 mm long, 1.6–1.9 mm wide, with indumentum of fine white or ferruginous hairs. Aril head reduced, 0.3–0.6 mm long, brown or black where reduced to seed testa, or brown and white, with short hairs. Aril appendages 3, linear, 1–2 mm long.
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