Skip to main content
padlock icon - secure page this page is secure

Taxonomic and Phylogenetic Evaluation of the American "Thlaspi" Species: Identity and Relationship to the Eurasian Genus Noccaea (Brassicaceae)

Buy Article:

$20.00 + tax (Refund Policy)

Nuclear ribosomal (ITS) and plastid (trnL-trnF) DNA sequence data from representatives of most New World species of Thlaspi (Brassicaceae), including the widespread North American T. montanum, have been studied to investigate their relationship to the Eurasian members now placed in the genus Noccaea , especially the European T. montanum (= N. montana) complex. ITS sequence data of the New World taxa were added to a previously published data set, which includes sequences of representative taxa of 11 of the 12 genera segregated from Thlaspi, to elucidate overall relationships within Thlaspi s.l. Sequences from Callothlaspi, Kotschyella, Masmenia, Microthlaspi, Neurotropis, Noccaea, Noccidium, Pseudosempervivum, Raparia, Thlaspi s.s., Thlaspiceras, and Vania, as well as of the closely related genera Bivonaea, Alliaria, Peltaria, and Teesdalia, were included in the study. The results show that the New World taxa of Thlaspi form a monophyletic group that should be assigned to Noccaea and that the North American "T.montanum" appear to be unrelated to the European plants referred to this species. Sequence distance values are of an order of magnitude that favors Pleistocene speciation and migration of the perennial Thlaspi species into the New World. It is concluded that the North American infraspecific taxa of T. montanum be recognized as Noccaea fendleri. The new combinations N. fendleri subsp. californica, N. fendleri subsp. glauca, N. fendleri subsp. idahoense, and N. fendleri subsp. siskiyouense are proposed.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Research Article

Publication date: April 1, 2004

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more