Bulrush n. (Bot.) A kind of large rush, growing in wet land or in water. Note: The name bulrush is applied in England especially to the cat-tail (Typha latifolia and Typha angustifolia) and to the lake club-rush (Scirpus lacustris); in America, to the Juncus effusus, and also to species of Scirpus or club-rush.
Collaborative International Dictionary of English 0.48