Rorippa islandica is a 35-50cm height annual, biennial
herb occurring in paddies or wetlands on roadsides. Radical leaves
are 5-15cm long, pinnately aperture, and the lobes coarsely cut
themselves afresh. On-stem leaves are shallowly cleft - each becomes
the upper the shallower upward, with bases expanding a little to
embrace the stems in a pair-of-ears way. Flowers are yellow, 3-4mm
in diameter, and fruit is 5-8mm in length. Bloom time: April-June.
Wild plants in and around Shimane
島根とその周辺の野生植物