Sisymbrium aculeolatum Boiss.
Annual, 5-20 cm tall, erect, simple or sparsely branched from the base, glabrous except the siliquae. Basal leaves often laxly rosulate, stalked, dissected, lyrate-pinnatifid, 2-4-jugate, sub-fleshy, 10-40 mm long, 4-8 mm broad; upper leaves few, distant, smaller but similar. Racemes (2-) 5-10-flowered, lax, up to 10 cm long in fruit. Flowers 3-4 mm across, white or pinkish; pedicels 1-3 (-5) mm long and thickened in fruit, often spreading horizontally. Sepals c. 2 mm long. Petals 4-5 mm long, 1-1.5 mm broad. Siliquae linear-subcylindrical, acute, 30-50 mm long, 1 mm broad, often arcuate or somewhat recurved, roughly hairy with simple, rigid, somewhat reflexed hairs; style inconspicuous, c. 0.5 mm long, thickened with a depressed subretuse stigma; septum somewhat rigid, membranous; seeds 20-36 in each locule, c. 1 mm long, oblong, brown.
Fl. Per.: April-June.
Type: Sinai, W. Schimper 124 (G,K).
Distribution: Sinai, Iran, Afghanistan and Pakistan.