Bulrush
Bulrush (bul"rush`) , noun
[Old English bulrysche, bolroysche; of uncertain origin, perh. from bole stem + rush.]
(Botany) A kind of large rush, growing in wet land or in water.
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.