Juncus balticus is a species of rush known by the common name Baltic rush. It is native to a large part of North and South America. In California it is very widespread and occurs in every county. It is a plant of wetlands and other mesic places, though sometimes found in non-wetland areas. It prefers freshwater but can handle some salinity. It spreads by a rhizome and will occupy any suitably moist area. It will hybridize with many other Juncus species. There is one recognized subspecies at this time, ssp. ater, which also occurs over a large part of the state.
Juncus balticus
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