Sisymbrium planisiliquum* (Fisch. & Mey.) Hook.f. & Thoms.
Annual, 10-40 cm tall, erect rarely branched, glabrous, glaucous. Leaves oblong-ovate, ± thickish, glabrous somewhat glaucous, entire; lower or basal obovate, shortly stalked or sub-sessile, obtuse, entire or sometimes obscurely toothed, 3-10 cm long, 1-3 cm broad; upper leaves usually oblong-ovate, sessile, cordate, amplexicaul, 2-9 cm long, 1-5 cm broad, often violet coloured. Racemes usually many flowered, corymbose, ebracteate, up to 20 cm long in fruit. Flowers small, about 5 mm across, pale yellow or whitish, often dark-veined; pedicel 5-10 mm long, increasing up to 15 mm in fruit, slender, not thickened. Sepals 3.5-5 mm long, 1.2 mm broad, linear, ± equal, inner not or hardly saccate at the base. Petals 6-7 mm long, 1.5-2 mm broad, narrowly oblong, gradually narrowed towards the base, apex rounded or obtuse. Stamens c. 4: 5 mm long; anthers about 1 mm long. Siliquae linear compressed, 40-70 (-90) mm long, 1.5-2 mm broad, erect, straight, torulose on the valves only, glabrous, with an incomplete mid-vein on the valves (usually distinct in the lower portion) ; beak very short-about 1 mm long, narrow, straight with a depressed capitate, inconspicuous stigma; septum membranous, not veined; seeds 12-24 in each locule, c. 1.5 mm long, oblong-ellipsoid, brown.
Type: Described from E. Caucasus, Talysh, Fischer (LE).
Distribution: Trans-Caspian region, Anatolia, C. Asia, Iran, Afghanistan and W. Pakistan.