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Cyperus

L. (1753)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Poales Family: Cyperaceae Genus: Cyperus

Description

Key Characters:

Growth Form: Annuals or perennial herbs.

Stems: Culms solid, Ieafy only at base.

Roots:

Leaves: Leaves simple. Leaves basal, 3-ranked, ligules absent. Blades elongate, linear, flattened or V-shaped in cross section, rarely reduced to bladeless sheaths. Margins entire. Veins parallel. Sheathing. Stipules absent.

Flowers: Flowers in inflorescence a terminal umbelliform corymb with several rays, sometimes congested into head-like clusters, subtended by several leaf-like involucral bracts, spikelets with a continuous, often flexuous rachilla, laterally flattened or subterete to subtetragonous rachilla jointed at base, often with an annular thickening immediately below spikelet, spikelets falling as a unit; glumes few to numerous, all nearly alike, 2– ranked, usually only 1 to few of these flower–bearing, rarely all flower–bearing stamens. Flowers bisexual (perfect). Calyx (sepals) absent. Corolla (petals) absent. Stamens 1–3; anther connective often prolonged beyond the thecae as an appendage. Ovary superior, 3-carpellate; style not jointed at base; stigmas 2-3.

Fruit: Achenes biconvex; laterally compressed. Seeds 1; seed coat thin; free from pericarp; embryo basal; endosperm abundant.

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Island Status

Dispersal Agents


Pollinators

Bibliography

Name Published In: Sp. Pl.: 44 (1753)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
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