Rice flat-sedge
Cyperus iria
Summary 2
Cyperus iria (also known as rice flat sedge and rice flatsedge) is a smooth, tufted sedge found worldwide. The roots are yellowish-red and fibrous. The plant often grows in rice paddies, where it is considered to be a weed.
Diagnostic 3
"Erect, not tufted, non-rhizomatous annuals; culms 12-50 cm tall, triquetrous. Leaves few, basal, 10-50 x 3-6 mm, linear, flat, gradually acuminate, scabrous on upper margins; sheaths 1-3 cm long, purplish-brown. Inflorescence compound, 8-15 cm across, diffuse, branches spicate; leafy bracts 3-5, the longest upto 35 cm long. Spikelets 4-5 x 1.5-2 mm, linear-oblong, bearing 6-10 florets, yellowish. Glumes distant, 1-1.5 x 1-15 mm, obovate-orbicular, apex rounded or emarginate, keeled, yellowish, margins white-hyaline. Stamens 2-3. Stigmas 3. Nut 1-1.5 x c. 0.5 mm, obovate, triquetrous, stipitate, brown."
Sources and Credits
- (c) National Aquarium, some rights reserved (CC BY-NC), uploaded by National Aquarium
- (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Cyperus_iria
- (c) India Biodiversity Portal, some rights reserved (CC BY), http://eol.org/data_objects/26335519
More Info
- iNat taxon page
- African Plants - a photo guide
- Atlas of Living Australia
- Biodiversity Heritage Library
- BOLD Systems BIN search
- Calflora
- CalPhotos
- eFloras.org
- Flora of North America (beta)
- Global Biodiversity Information Facility (GBIF)
- Go Botany
- HOSTS - a Database of the World's Lepidopteran Hostplants
- IPNI (with links to POWO, WFO, and BHL)
- Jepson eFlora
- Maryland Biodiversity Project
- NatureServe Explorer 2.0
- SEINet Symbiota portals
- Tropicos
- USDA PLANTS database
- VASCAN by Canadensys
- World Flora Online
- 日本のレッドデータ検索システム
- 植物和名−学名インデックス YList
