⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Thlaspi montanum in version 1.1 of The Plant List.
This name is a synonym of Noccaea fendleri subsp. siskiyouense .
The record derives from Tropicos which reports it as a synonym (record 100358066
) with original publication details: Mém. Mus. Natl. Hist. Nat., A., Zool. 21: 84 84 1971.