Thlaspi

Thlaspi, or pennycress,^[2] is a genus of herbs of temperate regions of the Eurasian continent. They occur in Central and South Europe, South-West Asia and two species are endemic to China. The Thlaspi has been proven to be a hyperaccumulator of heavy metals such as zinc and cadmium and therefore may be used in phytoremediation initiatives.^[3]

Thlaspi
Thlaspi arvense
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Brassicales
Family:	Brassicaceae
Genus:	Thlaspi L.
Synonyms[1]
Carpoceras (DC.) Link Cruciundula Raf. Metathlaspi E.H.L.Krause Teruncius Lunell Thlaspidea Opiz Thlaspidium Bubani Thlaspius St.-Lag.

Species

Thlaspi arvense

Nine species are accepted.^[1]

• Thlaspi armenum N.Busch
• Thlaspi arvense L. – field penny-cress
• Thlaspi brevistylum Mutel
• Thlaspi ceratocarpon (Pall.) Murray
• Thlaspi huetii Boiss.
• Thlaspi inhumile Ponert
• Thlaspi kochianum F.K.Mey.
• Thlaspi roseolum N.Busch
• Thlaspi syriacum Bornm.

Formerly placed here

• Mummenhoffia alliacea (L.) Esmailbegi & Al-Shehbaz (as Thlaspi alliaceum L.) – roadside penny-cress
• Noccaea arctica (A.E.Porsild) Holub (as Thlaspi arcticum A.E.Porsild) – arctic penny-cress
• Noccaea cypria (Bornm.) F.K.Mey. (as Thlaspi cyprium Bornm.) – Cyprus penny-cress
• Noccaea fendleri (A.Gray) Holub (as Thlaspi fendleri A.Gray) – Fendler's penny-cress
  • Noccaea fendleri subsp. californica (S.Watson) Al-Shehbaz & M.Koch (as Thlaspi californicum S.Watson) – Kneeland Prairie penny-cress
  • Noccaea fendleri subsp. idahoense (Payson) Al-Shehbaz & M.Koch (as Thlaspi idahoense Payson) – Idaho penny-cress
• Noccaea jankae (A.Kern.) F.K.Mey. (as Thlaspi jankae A.Kern.) – Slovak penny-cress
• Noccaea montana (L.) F.K.Mey. (as Thlaspi montanum L.) – alpine penny-cress
• Noccaea parviflora (A.Nelson) Holub (as Thlaspi parviflorum A.Nelson) – meadow penny-cress
• Noccaea perfoliata (L.) Al-Shehbaz (as Thlaspi perfoliatum L.) – Cotswold penny-cress
• Noccaea praecox (Wulfen) F.K.Mey. (as Thlaspi praecox Wulfen) – early penny-cress
• Noccaea rotundifolia (L.) Moench (as Thlaspi rotundifolium (L.) Gaudin) – round-leaved penny-cress