Thlaspi
Annual or perennial herbs, glabrous or with simple hairs. Leaves sessile or petiolate; margins entire or lobed; base sagittate or auriculate. Inflorescence a raceme. Sepals erect or ascending, equal; petals sometimes clawed, usually white, apex obtuse or emarginate; stamens 6. Fruit shape variable (Victorian plants obovate or suborbicular, less than 3 times as long as broad), indehiscent, flattened at right angles to the septum, usually notched at apex, ± enclosing the style; valves keeled, usually winged; seeds 5–8 per locule, in 1 row.
About 75 species from Eurasia; 1 species naturalised in Australia.
Thlaspi as currently treated is polyphyletic. Studies suggest that Thlaspi s.str. contains only 6 species (including the only species present in Australia - T. arvense). However, taxonomic changes are yet to be formalised, as such this genus is treated here in the broad sense.
