Diplotaxis muralis (L.) DC.

Foetid annual or biennial; stems ascending to erect, branching, leafy or not, (10)–30–40–(60) cm tall, glabrous or hairy with sparse stiff reflexed hairs. Lvs mostly basal, glaucescent, very variable, long-petiolate, glabrous to sparsely hairy; lower lvs obovate with sinuate margins to pinnatifid with entire or shallowly toothed margins, (3)–5–15 × 1–4 cm; upper lvs similar in shape, usually smaller. Racemes glabrous or sparsely hairy, 10–30–(60) cm tall. Pedicels 0.5–2 cm long. Sepals narrow-triangular, glabrous or sparsely hairy, 3.5–4 × 1–2 mm. Petals yellow, spathulate, shortly clawed, 3–7 × 2–4.5 mm. Silique 20–40–(45) × 1.5–2.5–(3) mm, without gynophore; beak seedless. Seeds oblong, brown, 1–1.5 mm long.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

Flowering: (Jul.)–Oct.–May–(Jun.); Fruiting: (Jul.)–Oct.–May–(Jun.)