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- Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)

Yavapai County Native & Naturalized Plants

Echinochloa colona - jungle rice

Synonyms: Panicum colonum
Other Common Names: awnless barnyard grass
Plant Form: Grass

Family: Poaceae

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Liz Makings @, Usage Rights Creative Commons Attribution-ShareAlike (CC BY-SA)
Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
  Grass Description -   Glossary of Grass Terminology

Origin: Introduced    Season: Warm
Habitat Description: Moist soils and disturbed areas such as seasonally flooded grasslands and cultivated or irrigated fields and ditches.
Plant Communities:Riparian, Disturbed Areas
Elevation: Below 5500 feet

Similar Species: Echinochloa crusgalli
General Description

Desc: Annual grass growing in clumps or spreading by rooting from trailing stem nodes or short stolons. Mature plants are prostrate or erect and range from 2 to 3 feet in width or height.
Identification Notes: Annual, blades flat. Widely spaced seedhead branching with few or no bristles distinguishes this from Echinochloa crusgalli. Spikelets are 2 to 3 mm long and not awned.
Grass Type: Annual  Rhizomes: N  Stolons: Y
Large Dense Clump (> 2 feet): Y  Bushy (highly branched): N
Height with Seedheads: 24 to 36 inches
Seedhead Structure: Branched - contracted  Seedhead Droops: N
Flowering Period: Jun - Oct
Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelets One-sided: Y
Awns: Absent   Three Awns: N  Awns Bent: N
Flower and Seedhead Notes: Seedheads are spike-like, 1 to 6 inches long with short, compact branches. Two-flowered awnless spikelets are arranged in 4 rows on one side of the seedhead and detach at maturity.
Vegetative Charcteristics

Blade Hairy: Y    Blade with White Margins: N    Blade Cross section: Flat
Blade Notes: Leaves are flat, grayish or dull green, sometimes having purplish banding; hairs on or near the margins. Stems are hairless except for hairs at the stem joints. They are reddish-purple at their base and can root at the lower nodes.
Sheath Hairy: N    Tuft of Hairs at top of Sheath or Collar: N    Ligules: Absent
Auricles (Ear-like lobes at collar area: N

Forage Value: Not available.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
Last Updated: Dec 13, 2022
Content Questions/Comments: Email Matt Halldorson  
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