Family • Cyperaceae - Cyperus iria Linn. - RICE FLATSEDGE

Scientifric names

Cyperus iria Linn.
Cyperus chrysomelinus Link
Cyperus microiria Steud.
Cyperus nangtciangensis Pamp.
Cyperus paniciformis Franch. & Sav.
Cyperus panicoides Lam.
Chlorocyperus iria Rikli

Common names

Alinang (Tag., Bik.)
Okokiang (Bon.)
Paiung-paiung (Bik.)
Sud-sud (Bik.)
Taga-taga (Bik.)
Grasshopper’s cyperus ((Engl.)
Ricefield flatsedge ((Engl.)
Umbrella sedge ((Engl.)

Other vernacular names

INDONESIA: Babawangan, Rumput jekeng kungit, Rumput silupak.
JAPANESE: Ko gome gayatsuri.
THAI: Kok huadaeng, Yaa kok saai, Yaa kok lek.
VIETNAMESE: C[os]i g[aj]o.


Additional Sources and Suggested Readings

(1) The lethal effects of Cyperus iria on Aedes aegypti / A M Schwartz, S M Paskewitz, A P Orth, M J Tesch, Y C Toong, W G Goodman / ournal of the American Mosquito Control Association. 01/04/1998; 14(1):78-82.

(2) Cyperus iria Linn / The Plant List

(3) Cyperus iria / The Knowledge Bank

Alinang is a tufted, glabrous annual herb, occasionally perennial, growing to a height of 10 to 70 centimeters. Roots are fibrous, 15 to 75. Stems are sharply 3-angled, tufted, smooth, 5 to 80 centimeters high. Leaves are short and long, 2 to 5 millimeters wide; sheath, reddish or purplish brown, enveloping the stem at the base. Umbels are 3 to 30 centimeters in diameter, the rays long and short, few to many. Spikes are loosely spicate. Spikelets are numerous, yellow or brown, 3 to 10 millimeters long. Glumes are 6 to 20, obovate, hardly imbricate, about 1.2 millimeters long, 3- to 5-angled, oblong ovoid.


– A very common paddy weed in open, wet places.
– Also found in China, Japan and Korea. In South East Asia: Bangladesh, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Pakistan, Sri Lanka, Thailand and Vietnam. Also in Australia, Fiji, Swaziland, and West Africa.

Tonic, stimulant, stomachic and astringent.

Parts utilized
Tubers, leaves.

– Decoction of ground tubers used for fevers.
– Among the Mundas of Chota Nagpur, tuber is ground together with Cyperus rotundus and taken for fever.
– In India, plant is considered tonic, stimulant, stomachic and astringent.

Study Findings
• Larvicidal / Mosquito Control: Study of leaves of six Cyperus species of varying ages were tested on the larvae of yellow fever mosquito. Only Cyperus iria was found to have significant levels of JH III (juvenile hormone III) and suggests a potential for a safe, inexpensive and readily available larvicidal.