Spikerushes

Eleocharis species -- Center for Aquatic and Invasive Plants

Eleocharis species

spikerushes

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    There are about 150 species of spikerushes worldwide, many aquatic, with about 2 dozen species native to Florida (Wunderlin, 2003). They may be encountered as floating tangled mats or dense clumps in the mud or as rooted green spikes emersed from a few feet of water, covering many acres. Some are cultivated as human food; some species are major food plants of birds and other animals.

    Spikerushes are sedges. Stems unbranched, many gas canals in cross section; leaf blades none, just sheaths at the base of the stem; inflorescence a single spikelet, on stem tips, no bracts; spikelets of various sizes, overlapping scales, few-to-many flowers.

    For brief control information, see Efficacy of Herbicide Active Ingredients Against Aquatic Weeds by K. Langeland, M. Netherland, and W. Haller.