A perennial or rhizomatous geophyte herb,
Eurychorda complanata exhibits a
graminoid growth form with tufted or shortly creeping rhizomes, and erect culms ranging from in height and in diameter. Leaves are reduced pale, glabrous sheaths along the stem with acute apices, approximately long. It has terminal inflorescences of spikelets, typically 5-20, arranged in a narrow panicle with shorter bracts.
E. complanata is
dioecious. Male spikelets are ovate to globose, about long, with many flowers, while female spikelets are elliptic, approximately long, usually pedicellate, and have fewer flowers. Both male and female flowers possess four tepals. It flowers in summer (November, December, January, February) and has dry dehiscent capsule fruit. ==Habitat and distribution==