Plant Profile: Cyperus iria

Taxonomy: Cyperus iria

Names

Ricefield Flatsedge, Rice Flatsedge, Rice Flat Sedge

  • Photo of Cyperus iria (Cyperus irias)

Phonetic Spelling:

Genus:Cyperus

Species:iria

Family:Cyperaceae

Ricefield flatsedge is a tropical sedge, either annual or perennial, belonging to the Cyperaceae family. This plant thrives in rice paddies and various other moist environments globally, particularly in tropical regions, and is considered a significant weed in rice, cotton, soybean, and other agricultural crops.

Cyperus iria Feature Summary

Cyperus iria Image Gallery

Tags

#sedge
#tropical

Similar Plants

Cyperus iria Feature Summary

Attributes
Tropical and Subtropical Asia and old world
worldwide
Perennial
Annual
Fruit
The fruit is an obovoid brown achene.
Brown/Copper
Flowers
Flowers are produced in open umbels on spikes that are subtended by 4-7 leaf-like bracts. The spikes are golden-brown in color, usually sessile, elongate and spreading. Spikelets are erect-spreading, crowded 6-24-flowers and golden to yellowish-green.
Gold/Yellow
Green
Leaves
The lance-linear green leaves are scabrid on the margins and mid-rib (having small, sharp projections) and V-shaped. The leaf sheath is reddish-brown and wraps around the stem.
Simple
Sheath
Linear
Lanceolate
Stem
Roughly triangular green stem
Smooth (glabrous)
Whole Plant Traits
Perennial
Annual
Weed
Landscape

Cyperus iria Attributes

Cyperus iria: Country Or Region Of Origin

Tropical and Subtropical Asia and old world

Cyperus iria: Distribution

worldwide

Cyperus iria: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Cyperus iria Fruit

Cyperus iria: Fruit Description

The fruit is an obovoid brown achene.

Cyperus iria: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Cyperus iria: Fruit Color

grass
Brown/Copper

Cyperus iria Flowers

Cyperus iria: Flower Description

Flowers are produced in open umbels on spikes that are subtended by 4-7 leaf-like bracts. The spikes are golden-brown in color, usually sessile, elongate and spreading. Spikelets are erect-spreading, crowded 6-24-flowers and golden to yellowish-green.

Cyperus iria: Flower Color

filter_vintage
Gold/Yellow
filter_vintage
Green

Cyperus iria: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Cyperus iria Leaves

Cyperus iria: Leaf Description

The lance-linear green leaves are scabrid on the margins and mid-rib (having small, sharp projections) and V-shaped. The leaf sheath is reddish-brown and wraps around the stem.

Cyperus iria: Leaf Color

spa
Green

Cyperus iria: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Cyperus iria: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Cyperus iria: Hairs Present

No
Yes

Cyperus iria: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Cyperus iria Stem

Cyperus iria: Stem Description

Roughly triangular green stem

Cyperus iria: Stem Color

grass
Green

Cyperus iria: Stem Is Aromatic

No
Yes

Cyperus iria: Stem Cross Section

Angular
Oval
Round
Square

Cyperus iria: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Cyperus iria Whole Plant Traits

Cyperus iria: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Cyperus iria Landscape

Cyperus iria: Problems

Allelopathic
Contact Dermatitis
Frequent Disease Problems
Frequent Insect Problems
Invasive Species
Malodorous
Messy
Poisonous to Humans
Problem for Cats
Problem for Children
Problem for Dogs
Problem for Horses
Short-lived
Spines/Thorns
Weak Wood
Weedy