Cyperus iria L.

Last updated: 12 May 2015

Scientific Name

Cyperus iria L.


Chlorocyperus iria (L.) Rikli, Cyperus chrysomelinus Link, Cyperus diaphaniria Steud., Cyperus microlepis Baker, Cyperus nangtciangensis Pamp., Cyperus paniciformis Franch. & Sav., Cyperus panicoides Lam., Cyperus resinosus Hochst. ex Steud., Cyperus santonici Rottb. [1]

Vernacular Name

English Dila grass, rice flat sedge [2]
India Agarmotha, bara chonca [2]
Indonesia Babawangan (Sundanese); rumput jekeng kungit (Javanese); rumput silupak (Sumatra) [3]
Thailand Kok huadaeng (Singburi); yaa kok saai (Nakhon Sawan); yaa kok lek (Ang Tong) [3]
Philippines Haga-ga, okokiang, taga [2], sud-sud, alinang (Bikol); okokiang (Bontok) [3]
Vietnam c[os]i g[aj]o [3]
Japan Ko gome gayatsuri [3]

Geographical Distributions

Cyperus iria is distributed from Iran, Afghanistan, China and Japan to Australia. This plant is also an important and widespread weed in eastern Africa; as well as a common weed throughout Indo-China, Thailand and Malesia. It have been introduced and naturalised in the south-eastern United States and the West Indies. [2]

C. iria occurs up to 700(-1200) m altitude in open wet locations and is a characteristic and common weed in lowland rice fields, but it may also occur as a weed in vegetables, maize, sugar cane, groundnut and soya bean. It can be found on along roadsides and river banks. [2]

Botanical Description

C. iria comes from the family of Cyperaceae. It is a tufted annual or sometimes perennial herb. [2]

The leaves are measuring about 3-6(-8) mm wide, flat or channeled and scabrid on the margins in the upper part. [2]

The inflorescence is simple or compound, and  up to measure about 40 cm long and with 3-5(-7) involucral bracts. The primary rays are 3-5(-8), very unequal, and with a size up to measure about 10(-18) cm long, spicately arranged spikelets and with 6-20(-24)-flowered. There are 2-3 stamens and 3 stigmas. [2]

The fruit is triquetrous, obovoid or ellipsoid in shape and it is dark brown to black shining in colour. [2]

C .iria are with fibrous also with yellowish-red in colour of roots while its stem is with a size measuring about (5-)15-50(-80) cm long. [2]


C. iria is able to flower throughout the year. [2]

Chemical Constituent

No documentation

Plant Part Used

No documentation

Traditional Use

No documentation

Preclinical Data

No documentation

Clinical Data

No documentation


No documentation

Poisonous Management

No documentation

Line drawing


Figure 1: The line drawing of C. iria L. [2]


  1. The Plant List. Ver1.1. Cyperus iria L.[homepage on the Internet]. c2013 [updated 2012 Apr 18; cited 2015 May 07]. Available from:
  2. Nguyen Khac Khoi. Cyperus iria L. In: de Padua LS, Bunyapraphatsara N, Lemmens RHMJ, editors. Plant Resources of South-East Asia No. 12(1): Medicinal and poisonous plants 1. Leiden, Netherlands: Backhuys Publisher, 1999; p. 227.
  3. Philippine Medicinal Plants. Alinang. Cyperus iria Linn. [homepage on the Internet] c2014. [updated 2014 Sep; cited 2015 May 12] Available from: