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Arctic Rush

Juncus arcticus

UncommonPlant
Illustration of Arctic Rush (Juncus arcticus)

Arctic Rush is a circumpolar wetland grass closely related to Baltic Rush, distributed across arctic and subarctic tundra and cold montane meadows throughout the Northern Hemisphere. It forms spreading colonies from stout rhizomes in wet, often peaty soils near ponds, stream edges, and alpine seeps. The dark brown flower clusters emerge from the stem sides, appearing in midsummer even at high latitudes. It is an important food and cover plant for waterfowl, shorebirds, and small mammals in remote northern habitats where few other wetland plants survive the harsh climate.

Habitat
Arctic tundra pond margins, alpine seeps, wet meadows, and subarctic stream banks from Alaska and Canada through montane areas of the western United States.
Diet
Seeds and stem bases eaten by Lapland Longspurs, Snow Buntings, and waterfowl; rhizome mats provide nesting substrate for shorebirds.
How common
Uncommon

Best time to see a Arctic Rush

The best time to see a Arctic Rush is May–July, when about 68% of U.S. sightings happen, based on 1,439 research-grade iNaturalist observations.

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