A genus of about 6 species, as much more narrowly circumscribed, annual herbs, native to Eurasia and n. Africa. Mummenhoff & Koch (1994), Meyer (1973, 1979), Koch & Al-Shehbaz (2004), and Al-Shehbaz (2014) discuss the reasons for separating Noccaea from Thlaspi; they are now additionally treated in separate tribes.
Ref: Al-Shehbaz (1986a); Al-Shehbaz (2010a) In Flora of North America Editorial Committee (2010); Al-Shehbaz (2014); Esmailbegi et al. (2018); Koch & Al-Shehbaz (2004); Meyer (1973); Meyer (1979); Mummenhoff & Koch (1994); Rollins (1993). Show full citations.