Carpoceras sibiricum Boiss., Diagn. Pl. Orient. 8: 37. 1849 [nom. illeg.].

 Thlaspi ceratocarpum (Pall.) Murray in Novi. Comment. Soc. Regiae Sci. Gott. 5: 26. 1775.

Notes. – Carpoceras sibiricum Boiss. is illegitimate because BOISSIER (1849) listed the earlier published Thlaspi ceratocarpum in synonymy. Boissier also neglected LINK (1831) who made the same error.

Both superfluous names of Carpoceras sibiricum are based on the same type collection, and MEYER (2001a) correctly placed them in the synonymy of the accepted name above in Thlaspi .

No material of Boissier’s name was located in the Geneva herbaria.

The name T. ceratocarpum was lectotypified by GERMAN (2011: 52).