Cyperaceae
Haspan flatsedge
Cyperus haspan
- Family
- Cyperaceae
- Genus
- Cyperus
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Common names
By language (7)
- Chinese
- 畦畔莎草, 水莎草
- dag
- Kofe
- English
- Haspan flatsedge
- Finnish
- Haspansädekaisla
- Japanese
- コアゼガヤツリ
- Russian
- Сыть гаспан
- Thai
- กกนา
Synonyms
- Cyperus adenophorus Schrad. ex Nees
- Cyperus adenophorus Schrad.
- Cyperus adenophorus var. aphyllus Boeckeler
- Cyperus americanus (Boeckeler) Palla
- Cyperus aphyllus Vahl
- Cyperus autumnalis Vahl
- Cyperus caespitosus Llanos
- Cyperus cayennensis Link
- Cyperus efoliatus Boeckeler
- Cyperus gracilis Muhl.
- Cyperus gramineus Roem. & Schult.
- Cyperus graminifolius Poir.
- Cyperus haspan f. coarctata Osten
- Cyperus haspan f. major C.B.Clarke
- Cyperus haspan subsp. haspan
- Cyperus haspan subsp. junciformis Kük.
- Cyperus haspan subsp. juncoides (Lam.) Kük.
- Cyperus haspan var. adenophorus (Schrad. ex Nees) Kük.
- Cyperus haspan var. americanus Boeckeler
- Cyperus haspan var. amplissimus Kük.
- Cyperus haspan var. bulboides Kük.
- Cyperus haspan var. coarctatus Nees
- Cyperus haspan var. coarctatus (Nees) Osten
- Cyperus haspan var. dietrichiae Domin
- Cyperus haspan var. firmicaulis Kük.
- Cyperus haspan var. flaccidissimus Kük.
- Cyperus haspan var. haspan
- Cyperus haspan var. mincrohaspan Makino
- Cyperus haspan var. riparius Kük.
- Cyperus haspan var. tuberifer T.Koyama
- Cyperus haspan var. tuberiferus T.Koyama
- Cyperus hyemalis Pursh ex C.B.Clarke
- Cyperus junceus Link
- Cyperus juncoides Lam.
- Cyperus laticulmis Spreng.
- Cyperus leptos Schult.
- Cyperus microcarpus Boeckeler
- Cyperus muehlenbergii Spreng.
- Cyperus nudus Kunth
- Cyperus nudus var. firmior J.Presl & C.Presl
and 13 more.
Flowers
- In flower
- March, May, July to November (from 44 flowering iNaturalist observations worldwide)
- Flower colour
- brown (USDA PLANTS Database)
Characteristics
- Growth habit
- Graminoid
- Lifespan
- Perennial
- In the US and Canada
- Hawaii: introduced, Lower 48 states: native, Pacific Basin: native, Puerto Rico: native
Photos
FlowerPhoto: chiuluan, CC BY 4.0, from iNaturalist 
FlowerPhoto: Jay Horn, CC BY 4.0, from iNaturalist 
FlowerPhoto: chiuluan, CC BY 4.0, from iNaturalist 
Photo: Forest & Kim Starr, CC BY 3.0, from Wikimedia Commons 
Photo: Greg Tasney, CC BY-SA 4.0, from iNaturalist 
Photo: No machine-readable author provided. Valérie75 assumed, CC BY-SA 3.0, from Wikimedia Commons Photo: branjavao, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Scott W. Gavins, CC BY 4.0, from iNaturalist 
Photo: No machine-readable author provided. Valérie75 assumed, CC BY-SA 3.0, from Wikimedia Commons Photo: branjavao, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Erwin Sieben, CC0, from iNaturalist Photo: Solís-Campos Mauricio, CC BY-SA 4.0, from Pl@ntNet via GBIF
More in Cyperus
- Papyrus sedgeCyperus papyrusCyperaceae
- NutgrassCyperus rotundusCyperaceae
- Yellow nutsedgeCyperus esculentusCyperaceae
- Cyperus alternifoliusCyperaceae
- Brown galingaleCyperus fuscusCyperaceae
- Tall flatsedgeCyperus eragrostisCyperaceae
- Variable flatsedgeCyperus difformisCyperaceae
- GalingaleCyperus longusCyperaceae
- Cyperus capitatusCyperaceae
- Ricefield flatsedgeCyperus iriaCyperaceae
- Jointed flatsedgeCyperus articulatusCyperaceae
- Pygmy sedgeCyperus michelianusCyperaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.