Code
CYPFC
Growth form
Sedge
Biological cycle
Annual
Habitat
Marshland
CYPFC
Growth form
Sedge
Biological cycle
Annual
Habitat
Marshland
🗒 Synonyms
| synonym | Chlorocyperus flavescens (L.) Rikli |
| synonym | Cyperus flavescens L. |
| synonym | Distimus flavescens (L.) Raf. |
🗒 Common Names
| Malagasy |
|
📚 Overview
Description
Global description
Pycreus flavescens is a small, annual plant, 10 to 20 cm high in general, that grows in clumps. Simple or compound inflorescence is finger shape, consisting of elliptical spikelets, greenish brown in colour.
General habit
Annual plant in clumps, 10 to 30 cm high.
Underground system
Fibrous roots.
Stem
The stem is erect, 10 to 30 cm long, triangular in section.
Leaf
The leaves are few; they are staged in the lower third of the stem, arranged in a tristichous way. The sheath is leafy at the base, the blade is linear almost as long as the flower stalk.
Inflorescence
The inflorescence is digitate or composed of short flower stalks underpinned by 2-4 spreaded leaf bracts. It consists of a number of spikelets usually greater than 5. It is usually simple but may consist of one or two groups of spikelets carried by lateral flower stalk.
Flower
The spikelets are narrowly elliptic. They are 5 to 10 mm long and 2 to 2.5 mm wide. They are greenish brown color. Style is bifidus.
Fruit
The fruit is a biconvex achene.
Pycreus flavescens is a small, annual plant, 10 to 20 cm high in general, that grows in clumps. Simple or compound inflorescence is finger shape, consisting of elliptical spikelets, greenish brown in colour.
General habit
Annual plant in clumps, 10 to 30 cm high.
Underground system
Fibrous roots.
Stem
The stem is erect, 10 to 30 cm long, triangular in section.
Leaf
The leaves are few; they are staged in the lower third of the stem, arranged in a tristichous way. The sheath is leafy at the base, the blade is linear almost as long as the flower stalk.
Inflorescence
The inflorescence is digitate or composed of short flower stalks underpinned by 2-4 spreaded leaf bracts. It consists of a number of spikelets usually greater than 5. It is usually simple but may consist of one or two groups of spikelets carried by lateral flower stalk.
Flower
The spikelets are narrowly elliptic. They are 5 to 10 mm long and 2 to 2.5 mm wide. They are greenish brown color. Style is bifidus.
Fruit
The fruit is a biconvex achene.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
No Data
📚 Nomenclature and Classification
No Data
📚 Natural History
Life Cycle
Life cycle
Annual
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Madagascar: In upland rice fields and at average altitude of Madagascar, Pycreus flavescens blooms and bears fruit from February to April.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
Cyclicity
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Pycreus flavescens is an annual species; it multiplies only by seed. Small seeds produced in large quantities are spread by water and tillage tools.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
Morphology
Growth form
Tuft plant with narrow leaves
Leaf arrangement
Alternate
Leaf type
Grass or grass-like
Grass-like leaf type
Sedge leaf
Type of prefoliation
Folded lead
Latex
Without latex
Stem section
Triangular
Root type
Fibrous roots
Hollow or solid stem
Solid stem
Stipule type
No stipule
Leaf attachment type
Cyperaceae leaf
Fruit type
Achene
Achene type
Achene biconvex
Lamina base
sheathing the triangular stems
Lamina margin
entire
Lamina apex
attenuate
Upperface pilosity
Glabrous
Lowerface pilosity
Glabrous
Simple leaf type
Lamina linear
Lamina section
folded
Lamina Veination
Parallel
Flower color
Red flowers
Brown
Inflorescence type
Condensed spike
Umbel
Stem pilosity
Glabrous
Life form
Sedge leaf
Look Alikes
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Pycreus lanceolatus (Poir.) C.B.Clarke, which is a similar species, differs from Pycreus flavescens by its larger size, the presence of rhizomes and spikelets that are generally longer.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
Ecology
Pycreus flavescens grows in waterlogged areas and slightly flooded marshland.
Madagascar: Pycreus flavescens develops in waterlogged areas or low flooded, alluvial soils, fertile enough, in sunny or slightly sunny places. It is a weed of lowland rice fields of semi-intensive culture system. It is found in damp places, on the edge of marshes and channels of different agro-ecological zones of Madagascar, up to 2000 m altitude.
Madagascar: Pycreus flavescens develops in waterlogged areas or low flooded, alluvial soils, fertile enough, in sunny or slightly sunny places. It is a weed of lowland rice fields of semi-intensive culture system. It is found in damp places, on the edge of marshes and channels of different agro-ecological zones of Madagascar, up to 2000 m altitude.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
No Data
📚 Habitat and Distribution
General Habitat
Habitat
Marshland
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Worldwide distribution
Pycreus flavescens is a species with global distribution: North America, Central and South America, Europe, Africa, Middle East, West Asia, India, Pakistan, China, Southeast Asia, Indonesia, Australia.
Pycreus flavescens is a species with global distribution: North America, Central and South America, Europe, Africa, Middle East, West Asia, India, Pakistan, China, Southeast Asia, Indonesia, Australia.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Occurrence
No Data
📚 Demography and Conservation
Risk Statement
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Local harmfulness
Benin: rare and scarce.
Burkina Faso: frequent and scarce.
Ivory Coast: rare and scarce.
Ghana: frequent and generally abundant.
Madagascar: Pycreus flavescens is a weed common in irrigated or flooded rice fields (shallow water) of highlands and eastern slopes, but rarely abundant.
Nigeria: rarebut abundant when present.
Chad: rare and scarce.
Benin: rare and scarce.
Burkina Faso: frequent and scarce.
Ivory Coast: rare and scarce.
Ghana: frequent and generally abundant.
Madagascar: Pycreus flavescens is a weed common in irrigated or flooded rice fields (shallow water) of highlands and eastern slopes, but rarely abundant.
Nigeria: rarebut abundant when present.
Chad: rare and scarce.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Uses and Management
Management
Global control
For general information on the weeding of irrigated rice and lowland in Africa, see here.
For weed control tips annual sedges irrigated rice and lowland in Africa, see here.
Local control
Madagascar: The management of Pycreus flavescens does not present any particular difficulty. Rice farmers use manual weeding, rotary hoe weeding or use herbicide treatment in late post-emergence to fight against this species in cultivation systems based on seasonally flooded rice farming.
For general information on the weeding of irrigated rice and lowland in Africa, see here.
For weed control tips annual sedges irrigated rice and lowland in Africa, see here.
Local control
Madagascar: The management of Pycreus flavescens does not present any particular difficulty. Rice farmers use manual weeding, rotary hoe weeding or use herbicide treatment in late post-emergence to fight against this species in cultivation systems based on seasonally flooded rice farming.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
No Data
📚 Information Listing
Global Biodiversity Information Facility (GBIF)
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Thomas Le Bourgeois
| Attributions | |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
References
- Johnson, D.E. 1997. Les adventices en riziculture en Afrique de l'Ouest. ADRAO/WARDA, Bouaké, Côte-d'Ivoire.
- CHERMEZON H., 1937 – Flore de Madagascar (Plantes vasculaires) 29è Famille CYPERACEES M.N.H.N. p. 120-121.
- MOODY K., 1989 –Weeds reported in Rice in South and Southeast Asia. IRRI Los Banos Philippines; 442 p.
- Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1972. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain.
- Grard, P., T. Le Bourgeois, J. Rodenburg, P. Marnotte, A. Carrara, R. Irakiza, D. Makokha, G. kyalo, K. Aloys, K. Iswaria, N. Nguyen and G. Tzelepoglou (2012). AFROweeds V.1.0: African weeds of rice Montpellier, France & Cotonou, Bénin, Cirad-AfricaRice eds.
Information Listing > References
- Johnson, D.E. 1997. Les adventices en riziculture en Afrique de l'Ouest. ADRAO/WARDA, Bouaké, Côte-d'Ivoire.
- CHERMEZON H., 1937 – Flore de Madagascar (Plantes vasculaires) 29è Famille CYPERACEES M.N.H.N. p. 120-121.
- MOODY K., 1989 –Weeds reported in Rice in South and Southeast Asia. IRRI Los Banos Philippines; 442 p.
- Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1972. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain.
- Grard, P., T. Le Bourgeois, J. Rodenburg, P. Marnotte, A. Carrara, R. Irakiza, D. Makokha, G. kyalo, K. Aloys, K. Iswaria, N. Nguyen and G. Tzelepoglou (2012). AFROweeds V.1.0: African weeds of rice Montpellier, France & Cotonou, Bénin, Cirad-AfricaRice eds.
Images
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Herbarium pictures ReCOLNAT for Pycreus flavescens: https://explore.recolnat.org/search/botanique/simplequery=Pycreus%2520flavescens
Herbarium pictures ReCOLNAT for Cyperus flavescens: https://explore.recolnat.org/search/botanique/simplequery=Cyperus%2520flavescensThomas Le Bourgeois
| Attributions | |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
🐾 Taxonomy
| Root | Root |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Liliopsida |
| Order | Poales |
| Family | Cyperaceae |
| Genus | Pycreus |
| Species | Pycreus flavescens (L.) P.Beauv. ex Rchb. |
📊 Temporal Distribution
📷 Related Observations
