pontederia cordata, common name pickerelweed

american aquatic background bayou bloom blooming blossom blue botanical botany color common continents cordata environment flood flora floral flower fresh garden green illustration invasive kanagawa landscape leaf louisiana mauve monocotyledonous mud name native natural nature perennial pickerel pickerelweed plant pond pontederia pontederiaceae purple seed spring stem summer swamp usa violet water weed wetland wild wildflower