Water Lily Flower, also known as: Triangle Grass, Water Triangular Grass, Silky Grass, and Three-Edge Flower. Perennial herb, height 60-100cm. Rhizome short and thick, with slender, long fibrous roots. Stems clumped, robust, acute triangular, with 2 leaf sheaths at the base, no leaves. Spathe 1, an elongation of the stem, upright, 3-14cm long. Spikelets 2-9, aggregated into a head, pseudolateral, ovate or oblong-ovate, 8-16mm long, 4-6mm wide, with numerous flowers; scale oblong-ovate, 4-5mm long, light brown, with a short point at the tip, 1 midrib, with reddish-brown short stripes on both sides; 6 bristles below, nearly equal in length to the nutlet, with spines; 3 stamens, anthers linear; 3 styles. Nutlet broadly ovate, flat triangular, 2-2.5mm long, brown-black when ripe, glossy, with faint wrinkles. Flowering and fruiting period May to September.