Annual herb, erect with ascending branches, up to 40 cm high; indumentum of curved and straight hairs. Plant occasionally tinged maroon on stems and alae. Leaves linear or narrowly elliptic to oblanceolate, 10–77 mm long, 1.5–10.0 mm wide; apex acute, obtuse or rounded, mucro 0.3–0.5 mm long; petiole to 1.5 mm long. Inflorescence axillary or supra-axillary, a raceme, rarely a solitary flower on internode preceding raceme, to 80 mm long, not exceeding the leaves, rarely longer than the leaves. Pedicel to 3 mm long. Alae antrorse to perpendicular or deflexed to reflexed in fruit (position), herbaceous, lanceolate, straight to falcate or narrowly dimidiate, 4.1–9.4 mm long, 1.1–2.9 mm wide, with straight and sometimes curved hairs. Corolla colour recorded as purple; floral appendages succulent, bifid to three to four times forked; upper petal claw 1.5 mm wide. Stamens terminate at stigma, monadelphous; staminal flap
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