Thlaspi micranthum Boiss. & C.I. Blanche in Boiss., Diagn. Pl. Orient. ser. 2, 5: 41. 1856 [nom. inval.].

Type: “pl. Syr. exs. speciminibus numerosioribus a cl. Blanche et Gaillardot acceptis a Th. perfoliato floribus subminoribus siliculisque paulò latiùs alatis non sat differt”.

= Noccaea perfoliata (L.) Al-Shehbaz in Harvard Pap. Bot. 19: 44. 2014.

Notes. – Thlaspi micranthum was mentioned by BOISSIER (1856) as a note under T. lilacinum but not accepted by him.

It was listed by Boissier in Flora Orientalis as a synonym of T. perfoliatum var. rotundatum, and both names by MEYER (2003a) as synonyms of Microthlaspi perfoliatum .

Noccaea perfoliata and a handful of other species form a complex of very closely related and morphologically rather similar taxa. The complex has recently been split by ALI et al. (2016) into three genera ( Microthlaspi F.K. Mey., Friedrichkarlmeyeria T. Ali & Thines, and Ihsanalshehbazia T. Ali & Thines) indistinguishable morphologically and better be maintained in Noccaea as broadly delimited by AL-SHEHBAZ (2014) and most recently recognized by ÖZÜDOĞRU et al. (2019).