- any of numerous plants belonging to the genus Epilobium, of the evening primrose family, having terminal clusters of purplish or white flowers.
- any of various temperate and arctic onagraceous plants of the genus Epilobium, having narrow leaves, terminal clusters of pink, purplish, or white flowers, and willow-like feathery seeds
- rosebay willowherb See rosebay
- purple loosestrife See loosestrife
- hairy willowherb See codlins-and-cream
