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Scirpus (club rush; family Cyperaceae) A genus of rhizomatous (see RHIZOME), perennial, grass-like herbs which have solid, often 3-angled stems. The leaves usually arise from the base with a closed stem sheath and grass-like blade with no ligule. The inconspicuous flowers are bisexual and borne in spikelets of 2 to many. They are held in a terminal, branched inflorescence. The perianth is a series of bristles or scales, and there are 3 stigmas. The ovary is superior. There are about 200 species, found throughout the temperate regions of the world. Most species occur in marshland and several are used in medicine. S. lacustris, the true bulrush of the northern hemisphere, is used for basketwork.

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