The Collaborative International Dictionary
Wikipedia
Usage examples of "pseudacorus".
Its specific name, Pseudacorus, refers to its similarity to another plant, pseudo being the Greek for false, while acorus is the generic name of the Sweet Sedge (Acorus calamus), with which it is supposed to have been confused, the plants when not in flower resembling it and growing in the same situations.
The Sweet Sedge, however, has an aromatic scent, while Iris Pseudacorus is odourless.