Sisymbrium L.
Annual or perennial taprooted herbs. Hairs simple or 0. Stems erect or decumbent, leafy. Lvs pinnatifid or pinnate, often with large hastate terminal and deflexed lateral lobes; upper stem lvs sometimes not lobed. Racemes bracteate or ebracteate. Sepals erecto-patent, not saccate. Petals yellow, sometimes white. Stamens 6, without appendages. Lateral nectaries 4, median 2, often all joined into a ring. Style short; stigma capitate or weakly 2-lobed. Silique narrow-lanceolate to linear, dehiscent; valves usually with prominent midrib and 2 weaker lateral veins; beak 0 or very short, seedless. Seeds ovoid to oblong, not winged, in 1 row per locule.
Key
90 spp., temperate Eurasia, Mediterranean, southern Africa, S. America. Naturalised spp. 5.
