Cardamine yezoensis Maxim. [Brassicaceae]
Ezowasabi (エゾワサビ, 蝦夷山葵)
Lifeform: perennial forb
Distribution: northern Japan (the distribution is controversial, due to the taxonomical inconsistency)
Habitat: wet sites, in particular, on streamsides
Synonyms
Cardamine akitensis Mochizuki
Cardamine fauriei Franch.
Cardamine yezoensis in Hokkaido
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Close to a creek in Teshio Experimental Forest, Hokkaido University, on June 15 2011.