pilewort

noun

1. Also called fireweed. a weedy composite plant, Erechtites hieracifolia, having narrow flower heads enclosed in green bracts.
2. a North American figwort, Scrophularia marilandica, having small, greenish flowers.
3. lesser celandine.

noun

1. any of several plants, such as lesser celandine, thought to be effective in treating piles