A native of North America, and found along the Pacific Coast from Canada south to Mexico and east to New Mexico.
A perennial that reproduces from seeds, and spreads with rhizomes. This is a common plant in wet places and creek banks, especially where its growth is not disturbed routinely. It generally is not a problem plant.
Mature plants can grow to 3 feet high, with stout stems that are noticeably flattened, and flattened leaves that are grass-like and up to 16 inches long. The flowering heads are a panicle of many lateral, short and up to 20 flowers in each grouping. These are seedlike and green to brownish, with pointed tips.
Characteristicts Important to Control:
Not generally needing control in natural settings, but if its growth interferes with water flow the plant can be controlled with a systemic non-selective herbicide.