Perennial subshrub, extensively branched, up to 100 cm. high; lower parts of stem and old branches strongly woody, up to 0.5 cm. in diameter, often sprouting new branches.. Stem (except woody parts), leaves and pedicels hispid to strigose.. Lower cauline leaves rather crowded, with up to 5 cm. long petioles emerging from a truncate lamina, oblong in outline, up to 18 cm. long and 4 cm. broad, lyrate-pinnate, with up to 4 pairs of triangular to oblong lateral lobes; terminal lobe 1/2–1/3 as long as the leaf, triangular to ovate, obtuse, truncate; margin sinuately dentate to repand; leaves upwards rapidly smaller and with short petioles, lyrate-pinnatifid, with usually one pair of lateral lobes and terminal lobe oblong, more than 1/2 as long as the leaf; uppermost leaves and bracts sessile, undivided, lanceolate, acute, truncate to cuneate, dentate.. Racemes ebracteate or with bracts at lowest pedicels with many flowers in a rather open corymb, in fruit lax, up to 30 cm. long, with 8–12 mm. long spreading pedicels.. Sepals oblong, moderately hispid, ± 5.5 mm. long.. Petals yellow, clawed, 10–12 mm. long, ± 4 mm. broad, apically truncate.. Longer stamens ± 8 mm. long; anthers ± 1 mm. long.. Nectaries low 2-topped glands inside each lateral stamen and a prominent spheroid gland outside each pair of median stamens.. Ovary linear, glabrous; stigma bifid.. Siliquae straight to slightly curved, somewhat torulose, 42–65 mm. long, 1.3–1.8 mm. broad; beak narrowly conical, 5.5–7 mm. long; valves glabrous with prominent midnerve.. Seeds light red-brown, elliptic in outline, ± 1.7 mm. long, ± 1.2 mm. broad, with a low, loose reticulum.
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