any of several perennial plants (genus Hosta) of the lily family, with broad, strongly ribbed basal leaves and clusters or racemes of trumpet-shaped flowers
See plantain lily in American Heritage Dictionary 4
noun
Any of several eastern Asian plants of the genus Hosta, widely cultivated for their clumps of long-lasting foliage and their white, blue, or lilac flowers borne in a terminal, scapose, one-sided raceme. Also called hosta.