Northeastern Asian Flora
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Cyperus haspan L.   (redirected from: Cyperus laticulmis Spreng.)
Family: Cyperaceae
[Chrysanthemum togakushiense Kitag. & Nagami, moreCyperus adenophorus Schrad. ex Nees, Cyperus adenophorus var. aphyllus Boeckeler, Cyperus aphyllus Vahl, Cyperus autumnalis Vahl, Cyperus cancellatus Ridl., Cyperus cayennensis Link, Cyperus efoliatus Boeckeler, Cyperus gramineus Roem. & Schult., Cyperus graminifolius Poir., Cyperus haspan f. coarctatus (Nees) Osten, Cyperus haspan f. major C.B.Clarke, Cyperus haspan subsp. junciformis K?k, Cyperus haspan subsp. juncoides (Lam.) K?., Cyperus haspan var. adenophorus (Schrad. ex Nees) K?., Cyperus haspan var. americanus Boeckeler, Cyperus haspan var. amplissimus K?., Cyperus haspan var. bulboides K?., Cyperus haspan var. cancellatus (Ridl.) K?., Cyperus haspan var. coarctatus Nees, Cyperus haspan var. dietrichiae Domin, Cyperus haspan var. firmicaulis K?., Cyperus haspan var. flaccidissimus K?., Cyperus haspan var. microhaspan Makino, Cyperus haspan var. riparius K?., 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 & C.Presl, Cyperus nudus var. flaccidior J.Presl & C.Presl & C.Presl, Cyperus pedatus Nees, Cyperus planiculmis Steud., Cyperus platyculmis R.Br., Cyperus triqueter Boeckeler, Cyperus tunicatus Roem. & Schult., Dendranthema pallasianum (Fisch. ex Besser) Vorosch.]
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  • Japan Flora
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Japan Flora: Rhizomes elongate, slender; culms solitary, nearly naked, 20-60 cm. long; leaves flaccid, short, often bladeless, 1-6 cm. long; corymbs  compound or simple, to 15 cm. across, with many spreading slender rays, the bracts 1 or 2, leaflike, longer or shorter than the inflorescence; spikelets digitate in groups of 4 or 5, linear, flat, 5-15 mm. long, 1.5-2 mm. wide, sanguineous; scales oblong to narrowly so, about 1.5 mm. long, emarginate and mucronulate with the green midrib ending as an erect slightly excurrent mucro; achenes 1/3 as long as the scale, white, 3-angled, elliptic; stigmas 3. Aug.-Oct Swampy places and rice paddies.

Honshu, Shikoku, Kyushu. Ryukyus, Formosa, China, Indochina, India, Malaysia, and Australia.

Cyperus haspan
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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