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Leaves up to 25 cm. long and usually not more than 4–5 mm. broad, but occasionally up to 16 mm. broad (in Belgian Congo material), usually linear, grass-like, occasionally very narrowly elliptic, slightly rough with short, somewhat bristly hairs mainly on the upper surface.
Posterior sepal 5 mm. long, keel-shaped, pilose; wing sepals 9–14 x 9–11 mm., obliquely suborbicular, sometimes very minutely ciliate on the margin, otherwise glabrous; anterior sepals 4 mm. long, free, keel-shaped, pilose.
Upper petals 7 mm. long, bent and contorted, ciliate at the base; carina 8 x 4 mm., crest 4 mm. long.
Annual (always ?) herb up to 3 m. tall with erect, sparsely pilosulose or glabrous stems.
Seeds 3 x 1.8 mm., cylindric, with long white silky hairs; caruncular appendages absent.
Capsule 8 x 5.5–6 mm., obovate-oblong, in outline, marginal wing 0.5–0.8 mm. broad.
Stamens 8.
