Cyperus articulatus L.

Jointed flatsedge (en), Souchet articulé (fr)

Species

Angiosperms > Poales > Cyperaceae > Cyperus

Characteristics

Perennial herb, robust, 0.6-1.6 m high, long-rhizomatous. Leaf blades absent (rarely up to 25 mm long. Culm scapose, septate (evident when dry), 3-12 mm in diam. at middle. Inflorescence a compound, terminal, lax anthela 40-150 mm in diam., with 1-3 sessile spikelet-clusters and 2-10 stalked spikelet clusters. Subtending bracts scalelike, 5-15 mm long. Spikelets linear, 5-55 x 1-2 mm. Glumes ovate, 3-4 mm long, keel pale, apex obtuse. Flowering time Dec. Nutlet narrowly elliptic, shortly apiculate, 1.4-1.7 x 0.4-0.5 mm, 3-angled, greyish yellow becoming reddish brown to dark olive-brown when mature; surface smooth.
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A herb. It is an almost leafless sedge. It keeps growing from year to year and is erect. The stems are 1.2 m tall and pithy. The stems are about 1 cm thick. They are cylinder shaped and pale yellow. The flowering stalk has fine drooping branches. It has black tubers. They have a lavender smell.
A robust, leafless, perennial herb, up to 1.6 m high. Involucral bracts scale-like, up to 15 mm long. Leaf sheaths loose, straw-coloured, purple or blackish, ending in a triangular limb. Glumes reddish brown or straw-coloured.
The only species of Cyperus to have a round leafless pithy stem which on drying appears articulated
Rays slender bearing clusters of cigar-shaped spikelets
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.7 - 1.8
Root system fibrous-root rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c4

Environment

A tropical plant. It grows in shallow water. It grows in damp soils along river banks. It is damaged by frost or drought. It can grow in slightly salty soils. It grows between 2-1,700 m above sea level. It grows in wet grass savannah. It can grow in arid places.
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Damp, marshy and flooded areas along the rivers and streams. Swamps or marshes, most often in shallow water at the margins of streams or lakes; usually near sea level but sometimes ascending to 1,500 metres.
In or near open water.
Light 6-9
Soil humidity 6-11
Soil texture 1-5
Soil acidity -
Soil nutriment -
Hardiness (USDA) 10-12

Usage

The plant is burnt to make salt. The fresh rhizome is peeled and eaten raw.
Uses environmental use essential oil food material medicinal poison social use
Edible rhizomes roots stems tubers
Therapeutic use Pain (leaf), Pain (root), Pain (stem), General tonic for rejuvenation (tuber), Colic (unspecified), Dyspepsia (unspecified), Fumigant (unspecified), Sedative (unspecified), Ache (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown by division. They can also be grown by seeds.
Mode seedlings
Germination duration (days) 25 - 30
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Cyperus articulatus leaf picture by Francisco Munguambe (cc-by-sa)

Flower

Cyperus articulatus flower picture by benjamin betey Campion (cc-by-sa)
Cyperus articulatus flower picture by Trap Hers (cc-by-sa)
Cyperus articulatus flower picture by Augustin Soulard (cc-by-sa)

Distribution

Cyperus articulatus world distribution map, present in Angola, Åland Islands, Benin, Burkina Faso, Bangladesh, Belize, Bolivia (Plurinational State of), Brazil, Botswana, Central African Republic, Congo, Cabo Verde, Costa Rica, Cuba, Dominica, Algeria, Ecuador, Egypt, Eritrea, Ethiopia, Gabon, Georgia, Ghana, Guinea, Gambia, Guinea-Bissau, Guatemala, Guyana, Honduras, Haiti, Indonesia, Iran (Islamic Republic of), Iraq, Jamaica, Kenya, Liberia, Madagascar, Mali, Myanmar, Mozambique, Mauritania, Mauritius, Namibia, Nigeria, Nicaragua, Nepal, Pakistan, Panama, Peru, Palau, Puerto Rico, Paraguay, Réunion, Rwanda, Saudi Arabia, Sudan, Senegal, Singapore, Sierra Leone, Somalia, Suriname, eSwatini, Seychelles, Chad, Togo, Thailand, Tanzania, United Republic of, Uganda, Uruguay, United States of America, Venezuela (Bolivarian Republic of), Viet Nam, Yemen, South Africa, Zambia, and Zimbabwe

Conservation status

Cyperus articulatus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:303822-1
WFO ID wfo-0000367849
COL ID 33BLY
BDTFX ID -
INPN ID 629513
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cyperus borbonicus Cyperus cordobensis Cyperus fistulosus Cyperus niloticus Cyperus nodosus Cyperus subnodosus Chlorocyperus articulatus Chlorocyperus cordobensis Cyperus autumnalis Cyperus gymnos Cyperus interceptus Cyperus subarticulatus Cyperus articulatus f. longispiculosus Cyperus articulatus Papyrus pangorei Cyperus articulatus var. conglomeratus Cyperus articulatus var. erythrostachys Cyperus articulatus var. fistulosus Cyperus articulatus var. multiflorus Cyperus articulatus var. nodosus Cyperus corymbosus var. subnodosus Cyperus nodosus var. subnodosus Cyperus nodosus var. aphyllus Cyperus corymbosus var. pangorei Cyperus articulatus var. articulatus Cyperus corymbosus var. subnodosus Cyperus articulatus