Sisymbrium officinale (L.) Scop., it is an annual or biennial herb, up to 90 cm tall, slimy branched, erect, hairy with rigid, reflexed hairs. Lower leaves deeply pinnatisect with ± rounded terminal lobes. Upper cauline leaves smaller with a narrow, often hastate terminal lobe. Flowers c. 4 mm across, yellow. Pedicels 2-4 mm long in fruit, thickened and adpressed to the axis, erect Sepals c. 2.5 mm long. Petals 3-4 x 1 mm. Stamens c. 2-3 mm; anthers c. 0.5 mm, not exserted. Siliquae 10-15 (-20) x 1 (-2) mm, straight, conical at the apex, ± hispid (rarely glabrous); style 0.5-1 mm with short depressed stigma; valves rigid, 3-veined; septum strong, sub membranous. Seeds c. 10 in each locule, c. 0.8 mm long, reddish-brown.
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