Juncus effusus subsp. effusus

Common rush, Common Rush

Family: Juncaceae · Type: perennial · Not Native

Common rush is a naturalized perennial found in northern Sierra Nevada, central Valley, and high Cascade Range bioregions in lakeshores, wet pastures, and disturbed damp ground at elevations below 1,700 meters. With no specific flowering data available, this plant has pale brown perianth structures with delicate spreading characteristics. Growing with robust stems up to 105 centimeters tall and 2 to 5 millimeters wide, it features 14 to 26 fine ridges along each stem side and a solid internal pith. Its leaf sheaths range from 5 to 14 centimeters long, with deep brown coloration below and green to pale brown upper sections, displaying thin margins often dark-banded and converging at a broad summit. The fruit is small, measuring 1.7 to 2 millimeters long, oblong-truncate, and brown with concave partitions united only at the base.

Habitat: Lakeshores, wet pastures, disturbed damp ground

Elevation: < 1700 m

Bioregions: CaRH, n SN, ScV

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.