What does "bulrush" mean?

Bulrush: 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 T. angustifolia) and to the lake club-rush (Scirpus lacustris); in America, to the Juncus effusus, and also to species of Scirpus or club-rush.

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