Cyperus nutans

Cyperus nutans is a sedge of the family Cyperaceae that is native to Australia, China, India, Bangladesh, south-east Asia, Malaysia, India, and Indonesia. The rhizomatous perennial sedge typically grows to a height of 1.5 metres (4.9 ft). The culms are three sided with sharp edges and concave sides. The culms are typically up 100 cm (39 in) in length and have a diameter of 10 mm (0.39 in). The leaves are usually shorter than the culms and have a width of around 6 to 12 mm (0.24 to 0.47 in). It blooms between February and July and produces brown flowers. Each compound inflorescence has six to ten primary branches up to a length of 30 cm (12 in). The narrow-cylindrical spikes have a length of 2 to 3 cm (0.79 to 1.18 in) with a 5 mm (0.20 in) diameter. After flowering a dark brown narrow-ellipsoid to narrow-obovoid shaped nut will form. The species was first formally described by the botanist Martin Vahl in 1805 as part of the work Enumeratio Plantarum, from a specimen collected in India.......read more on Wikipedia.