- shellflower, shell-flower, turtlehead, snakehead, snake-head, Chelone glabra - showy perennial of marshlands of eastern and central North America having waxy lanceolate leaves and flower with lower part creamy white and upper parts pale pink to deep purple
--1 is a kind of marsh plant, bog plant, swamp plant
--1 is a member of Chelone, genus Chelone