Definition of water primrose in English:

water primrose

noun

  • 1The water violet Hottonia palustris, which is a member of the primrose family (now rare).

  • 2Any of various aquatic or waterside plants of the genus Ludwigia (family Onagraceae), having yellow, primrose-like flowers; especially Ludwigia hexapetala, native to tropical America but naturalized elsewhere and often considered an invasive weed.

Origin

Mid 19th century; earliest use found in William Houghton (?1829–1897).