The Collaborative International Dictionary
Iris Pseudacorus
Water flag \Wa"ter flag`\ (Bot.) A European species of Iris ( Iris Pseudacorus) having bright yellow flowers.
Wikipedia
Iris pseudacorus
Iris pseudacorus (yellow flag, yellow iris, water flag, lever) is a species in the genus Iris, of the family Iridaceae. It is native to Europe, western Asia and northwest Africa. Its specific epithet, meaning "false acorus," refers to the similarity of its leaves to those of Acorus calamus, as they have a prominently veined mid-rib and sword-like shape.
Usage examples of "iris pseudacorus".
The Sweet Sedge, however, has an aromatic scent, while Iris Pseudacorus is odourless.