Isolepis sororia Kunth

Annual herb, tufted, up to 0.15 m high. Leaf blades filiform, 0.1-0.5 mm wide. Culm filiform, 0.2-0.5 mm in diam. Inflorescence a terminal head of 1-3 spikelets. Subtending bract suberect, very short. Spikelets ovate, 1.7-5.8 x 2 mm, 7-23-flowered. Glumes boat-shaped, 1.2-1.5 x 0.6-1.0 mm, keel excurrent into minute point. Style branches 2. Flowering time Dec. Nutlet very broadly elliptic, 0.7-0.9 x 0.5-0.7 mm, biconvex (± spherical), brown, surface coarsely reticulate, cells transversely elongated.