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Scirpus spp.:
Bulrush species
Scirpus spp. Bulrush species. Cyperaceae (sedge family).
Native annuals or perennials. Grow from rhizomes to form clumps of slender, smooth, jointless stems arising above water or lower marsh plants. Rarely grows submersed. Many species are tall, growing to 10 ft (3 m), while others are as short as 6 in (15 cm). Stems are often round but can be edged or three-angled (triangular in cross-section); they usually have pith. Leaves are found at the base or lower stem; they consist of a cylindrical sheath that entirely encloses the stem and that usually gives rise to a linear blade of varying length; some species have leaf sheaths but lack blades entirely. A cluster of flowers, often hanging from slender stalks and resembling a brown club or plume, emerges from the top, or from one side of the upper third, of the stem. Individual flowers are grass-like rather than showy, variable in shape and usually made up of brown or green bracts or spikes.
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