Uniola paniculata, also known as sea oats, seaside oats, araña, and arroz de costa,[1] is a tall subtropical grass that is an important component of coastal sand dune and beach plant communities in the southeastern United States, eastern Mexico and some Caribbean islands.

Its large seed heads that turn golden brown in late summer give the plant its common name.

Its tall leaves trap wind-blown sand and promote sand dune growth, while its deep roots and extensive rhizomes act to stabilize them, so the plant helps protect beaches and property from damage due to high winds, storm surges and tides.

The seeds are dispersed by wind and can be carried long distances by storms and ocean currents, but reproduction commonly occurs vegetatively by forming buds around stem bases.

Off-road vehicles and foot traffic damage the plants, disrupt their roots and compact the sand.

The oats are a crucial component of the area's hurricane defense strategy and have helped to stave off damage from tropical storms.

[12] Seeds of U. paniculata provide food for red-winged blackbirds, sparrows and other songbirds, as well as marsh rabbits and mice.