Overview

Comprehensive Description

Brief

"Red List Category & Criteria: Least Concern ver 3.1 Year Assessed: 2010 Assessor/s: Kumar, B. Reviewer/s: Sadasivaiah, B., Bhat, G.K., Rao, M.L.V., Dahanukar, N. & Molur, S. Contributors: Molur, S. Justification: Cyperus imbricatus is widely distributed and has no threats, hence assessed as Least Concern. Conservation Actions: No conservation actions are known or needed for this species."
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Brief

Flowering class: Monocot Habit: Herb
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Distribution

Range Description

Cyperus imbricatus is distributed almost pantropical. In India it is known to occur in Assam, Kerala, Madhya Pradesh (Satna), Meghalaya (Khasia), Rajasthan, Tamil Nadu (Madurai, Nilgiri- Kodaikannal water falls, Pykara) and West Bengal (Cook 1996, Verma 2001).
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"
Global Distribution

Pantropical

Indian distribution

State - Kerala, District/s: Kozhikkode, Malappuram

"
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"Range Description: Cyperus imbricatus is distributed almost pantropical. In India it is known to occur in Assam, Kerala, Madhya Pradesh (Satna), Meghalaya (Khasia), Rajasthan, Tamil Nadu (Madurai, Nilgiri- Kodaikannal water falls, Pykara) and West Bengal (Cook 1996, Verma 2001). Countries - Native: Argentina; Bangladesh; Belize; Benin; Bolivia; Brazil; Cameroon; Chile; China (Guangdong); Colombia; Costa Rica; Côte d'Ivoire; Dominica; Dominican Republic; Ecuador; El Salvador; Ethiopia; Gabon; Guatemala; Honduras; India (Assam, Kerala, Madhya Pradesh, Meghalaya, Rajasthan, Tamil Nadu, West Bengal); Indonesia; Liberia; Madagascar; Mexico; Nepal; Nicaragua; Niger; Nigeria; Panama; Papua New Guinea; Paraguay; Peru; Philippines; Senegal; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Togo; Trinidad and Tobago; United States (Colorado); Uruguay; Venezuela; Zambia"
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Distribution in Egypt

Nile region.

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Global Distribution

Egypt, tropical Africa, Madagascar, Seychelles, Afghanistan, India, Sri Lanka, Myanmar, China, east Indies, Philippines, central and south America.

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Cosmopolitan.
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Distribution: Pantropical.
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Physical Description

Morphology

Description

Perennial, 30-60 cm. Rhizome short, ascending or horizontal, with tillers. Stem 2-3 mm diam., trigonous, smooth, lower edges obtuse. Leaves shorter than or equalling stem; sheaths to 20 cm, soft, brown or dark brown, often reddish, mouth margin slightly concave; blades to c. 40 cm long, to 5.5 mm wide, flat or folded, keeled, margins narrowly recurved, margins and keel towards apex scabrous, apex trigonous, acute, scabrous. Inflorescence 5-15 cm, a conical or rounded anthelodium; 4 or 5 lowermost bracts leaf-like, to more than 40 cm; primary branches commonly 5-8, to 80 mm, tubular prophyll c. 10 mm, bi-nerved; secondary anthelodia to c. 40 mm, of 5-8 spreading clusters of spikes; sometimes small tertiary anthelodia by 2-3 clusters of spikes, c. 7 mm; cluster of spikes 10-35 x 3-8 mm, with c. 20 to over 100 spikes closely imbricating, spirally, some at cluster base often digitately arranged; cluster rachis reddish brown, angular, narrowly winged; spikes not reflexed, 4-8 x c. 1.5 mm, glume-like bract, c. 0.8 mm, bi-nerved glume-like prophyll, c. 0.6 mm, rachis c. 0.3 mm wide, flat, quadrangular, internodes c. 0.25 mm; glumes c. 1.5 mm, cymbiform, slightly keeled, mucronate, sides obscurely nerved, reddish brown, margins widely scarious, sligthly inrolled. Nut 0.6 x 0.3 mm, ellipsoid, obtusely trigonous, yellowish brown, very finely reticulate, almost smooth.
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Diagnostic Description

Diagnostic

"Perennial, 30-60 cm. Rhizome short, ascending or horizontal, with tillers. Stem 2-3 mm diam., trigonous, smooth, lower edges obtuse. Leaves shorter than or equalling stem; sheaths to 20 cm, soft, brown or dark brown, often reddish, mouth margin slightly concave; blades to c. 40 cm long, to 5.5 mm wide, flat or folded, keeled, margins narrowly recurved, margins and keel towards apex scabrous, apex trigonous, acute, scabrous. Inflorescence 5-15 cm, a conical or rounded anthelodium; 4 or 5 lowermost bracts leaf-like, to more than 40 cm; primary branches commonly 5-8, to 80 mm, tubular prophyll c. 10 mm, bi-nerved; secondary anthelodia to c. 40 mm, of 5-8 spreading clusters of spikes; sometimes small tertiary anthelodia by 2-3 clusters of spikes, c. 7 mm; cluster of spikes 10-35 x 3-8 mm, with c. 20 to over 100 spikes closely imbricating, spirally, some at cluster base often digitately arranged; cluster rachis reddish brown, angular, narrowly winged; spikes not reflexed, 4-8 x c. 1.5 mm, glume-like bract, c. 0.8 mm, bi-nerved glume-like prophyll, c. 0.6 mm, rachis c. 0.3 mm wide, flat, quadrangular, internodes c. 0.25 mm; glumes c. 1.5 mm, cymbiform, slightly keeled, mucronate, sides obscurely nerved, reddish brown, margins widely scarious, slightly inrolled. Nut 0.6 x 0.3 mm, ellipsoid, obtusely trigonous, yellowish brown, very finely reticulate, almost smooth."
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Synonym

Cyperus radiatus Vahl, Enum. Pl. 2: 369. 1805; Kükenthal, in Engler, Pflanzenr. IV.20, 101: fig. 9, G-J. 1935.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
It is a perennial herb grows in seasonally flooded areas, margins of ponds, ditches, swamps, river banks, mostly on sandy soil and muddy places (Cook 1996, Verma 2001) and also in wet lands (Bhargavan 1989).

Systems
  • Terrestrial
  • Freshwater
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General Habitat

"Habitat and Ecology: It is a perennial herb grows in seasonally flooded areas, margins of ponds, ditches, swamps, river banks, mostly on sandy soil and muddy places (Cook 1996, Verma 2001) and also in wet lands (Bhargavan 1989). Systems: Terrestrial; Freshwater List of Habitats: 5, 5.1, 5.2, 5.4, 5.8, 5.10, 14, 14.4, 15, 15.8"
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General Habitat

Wetlands
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Nile banks.

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Alluvial marshes.
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Life History and Behavior

Cyclicity

Flowering and fruiting: March-July
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Flower/Fruit

Fl. Per.: June.
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Life Expectancy

Perennial.

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2011

Assessor/s
Kumar, B.

Reviewer/s
Sadasivaiah, B., Bhat, G.K., Rao, M.L.V., Dahanukar, N. & Molur, S.

Contributor/s
Molur, S.

Justification
Cyperus imbricatus is widely distributed and has no threats, hence assessed as Least Concern.
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"Red List Category & Criteria: Least Concern ver 3.1 Year Assessed: 2010 Assessor/s: Kumar, B. Reviewer/s: Sadasivaiah, B., Bhat, G.K., Rao, M.L.V., Dahanukar, N. & Molur, S. Contributors: Molur, S. Justification: Cyperus imbricatus is widely distributed and has no threats, hence assessed as Least Concern. Conservation Actions: No conservation actions are known or needed for this species."
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Population

Population
No population information for the species.

Population Trend
Unknown
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Population: No population information for the species. Population Trend: Unknown
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Threats

Major Threats
No threats have been reported for this species.


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Major Threat (s): No threats have been reported for this species.
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Management

Conservation Actions

Conservation Actions
No conservation actions are known or needed for this species.
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Notes

Comments

The description is primarily based on five specimens from India.
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