IUCN threat status:

Least Concern (LC)

Comprehensive Description

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General: Sedge Family (Cyperaceae). Creeping spikerush is a perennial, heavily rhizomatous wetland plant that is found from low to mid elevations. It has a dense root mass that extends deeper that 40 cm in the soil profile. The stems are singular or in small clusters and it will continue to grow to keep the heads out of the water if the water rises slowly. The stems are upright, round, and may reach 1.2 m in height (height is dependent on the depth of water in the growing environment). The leaves are reduced to sheaths clustered at the base of the stems. The flowers are borne in a terminal spikelet, 1 flower per scale with 2 stigmas. Plants typically flower from June through September. The seeds are yellow to brown lenticular achenes, 1.5-2.5 mm long including tubercle, and subtended by up to 8 bristles. The seed ripens in late August to October. Seeds are held tightly in the seed head for a long period of time.

Distribution: It is found from the West Coast of the US, east to the Upper Peninsula of Michigan, and south to Louisiana. For current distribution, please consult the Plant Profile page for this species on the PLANTS Web site.


Public Domain

USDA NRCS Idaho State Office, Boise, Idaho

Source: USDA NRCS PLANTS Database

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