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Annual or biennial herb or subshrub 20–30, occasionally to 60 cm high, erect. Basal leaves pinnatifid, lobes narrowly linear; cauline leaves linear, pinnate to entire, bases usually attenuate, marginal hairs short, acute or somewhat obtuse. Inflorescence an elongated raceme. Sepals 0.5–1 mm long. Petals reduced or absent. Stamens 2, median. Stigma subsessile. Silicula elliptic, 2.5–3.0 mm long, c. 2 mm wide; wing slight in upper half, forming slight narrow notch; pedicels 4–6 mm long, puberulous on adaxial surface only, somewhat flattened, spreading. Seeds 1.2–1.5 mm long; radicle incumbent.
