Morphometric studies of polyploid Cardamine species (Brassicaceae) from Japan: solving a long-standing taxonomic and nomenclatural controversy.

Abstract

We explored morphological variation in a group of East Asian Cardamine. The following species are recognised in Japan: C. schinziana O.E.Schulz (2n = 6x, 8x), C. torrentis Nakai (2n = 8x), C. valida (Takeda) Nakai (2n = 4x), and C. yezoensis Maxim. (2n = 6x-12x).

Cardamine amariformis Nakai (2n = 4x) from Korea is also discussed but may be conspecific with C. valida, pending further studies.

Keywords

• Morphometry
• polyploidy
• Cardamine
• Brassicaceae
• Japan
• Korea
• nomenclature.