- willowherb - a plant of the genus Epilobium having pink or yellow flowers and seeds with silky hairs
--1 is a kind of herb, herbaceous plant
--1 is a member of Epilobium, genus Epilobium
--1 has particulars:fireweed, giant willowherb, rosebay willowherb, wickup, Epilobium angustifolium; hairy willowherb, codlins-and-cream, Epilobium hirsutum