The Collaborative International Dictionary
Samolus Valerandi
Brookweed \Brook"weed`\, n. (Bot.) A small white-flowered herb ( Samolus Valerandi) found usually in wet places; water pimpernel.
Wikipedia
Samolus valerandi
Samolus valerandi is a species of water pimpernel native to a very wide area across Europe, Africa, Asia, Australia, and the Americas. Common names include seaside brookweed, brookweed, thin-leaf brookweed, water cabbage, and water rose.