Fimbristylis dichotoma, the forked fimbry, is a tufted erect, annual or perennial plant, 10–80 cm tall, with numerous long stems about 2 mm in diameter, slightly three-angled, compressed below the inflorescence, node-less, smooth. The root system is fibrous, wiry, black. Short rhizomes. Leaves numerous, forming a dense tuft at the base of the stem, being at least half as long as the stem.
Scirpus dichotomus Linnaeus, Sp. Pl. 1: 50. 1753; Fimbristylis annua (Allioni) Roemer & Schultes var. diphylla (Retzius) Kükenthal; F. brizoides Nees & Meyen; F. diphylla (Retzius) Vahl subsp. diffusa D. B. Ward; F. glauca Vahl; F. polymorpha Boeckeler; Scirpus diphyllus Retzius