Rice flatsedge
Cyperus iria
The height of C. iria plants varies from 8 to 60 cm. The roots are numerous, short and yellowish-red. The culms are tufted, triangular, glabrous, green and 0.6-3.0 mm thick. The leaves are linear-lanceolate, usually all shorter than the culm, 1-8 mm wide, flat, and scabrid on the margin and major ribs; leaf sheaths are green to reddish-brown, membraneous and envelope the culm at the base.
The inflorescence is simple or compound, usually open, 1-20 cm long and 1-20 cm wide, with groups of spikes which are either sessile or on 0.5-15.0 cm long peduncles (rays). Inflorescence bracts (involucre) are leafy, three to five (occasionally seven), the lower one longer than the inflorescence, 5-30 cm long, 1-6 mm wide. The spikes are sessile or almost so, elongate, and rather dense. Spikelets are erect-spreading, crowded, 6-24-flowered, 2-13 mm long, 1.5-2.0 mm wide, golden to yellowish-green.
![](https://static.catalog.farmis.lt/problems/3/38/38b/38bb882f-c109-40c1-aafa-b1ef254cd620.jpg)
![](https://static.catalog.farmis.lt/problems/5/50/508/5086d034-7b26-4371-b90f-0fdd87fce51f.jpg)
![](https://static.catalog.farmis.lt/problems/f/f2/f2c/f2caeede-d64f-4039-9ec9-ad4a4dd2ebb3.jpg)
![](https://static.catalog.farmis.lt/problems/8/8f/8f0/8f0c4521-fff1-43a5-8d19-5685e9f19ef0.jpg)
![](https://static.catalog.farmis.lt/problems/2/25/25d/25d73140-47f7-45a5-a400-66092da3bcb7.jpg)
![](https://static.catalog.farmis.lt/problems/f/fa/fac/fac69f18-8593-4332-b648-fc2d830ecf1e.jpg)
![](https://static.catalog.farmis.lt/problems/b/bd/bd9/bd965cec-7a6c-41b0-a8bb-a4485a32e3a1.jpg)
![](https://static.catalog.farmis.lt/problems/6/69/693/693fa81c-b5f4-4b04-83ac-e3b94c9dd71d.jpg)
![](https://static.catalog.farmis.lt/problems/6/6b/6be/6be45f29-6f1d-4130-9a2f-2d00afced645.jpg)
![](https://static.catalog.farmis.lt/problems/4/4e/4eb/4eb414e1-14b7-4c90-b413-8dbf0719e501.jpg)