Species: 

Cyperus rotundus 

Common Name: 

nutgrass

Systems Affected (standardized): 

cropland/pastureland, disturbed/waste areas, riparian/aquatic, rangeland, forest/woodland, urban/garden

Regions(s) present (updated by AB): 

SE

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Impacts: 

Infests crop production areas in tropical and temperate climates, causing large losses in crop yields.
Altered trophic level
Conflict
Damaged ecosystem services
Ecosystem change/ habitat alteration
Infrastructure damage
Modification of hydrology
Modification of nutrient regime
Modification of successional patterns
Monoculture formation
Negatively impacts agriculture
Reduced native biodiversity
Threat to/ loss of native species
Damages animal/plant products

Source? likely to be reintroduced: 

The risk of introduction of C. rotundus is very high. This species is highly mobile and highly adaptable to different environments. It also benefits from human-related activities. Consequently it is considered one of the “world’s worst weeds” with the potential to negatively impact agriculture and natural ecosystems by displacing native plants or by changing the availability of food or shelter for native animals. This rapidly growing plant can quickly form dense colonies due to its ability to produce an extensive system of rhizomes and tubers. Thus, its likelihood of invading new habitats remains high.

Info Blurb: 

Infests crops, causing large losses in yields. Can form monocultures. Grows rapidly and can quickly form dense colonies due to its ability to produce an extensive system of rhizomes and tubers. Highly adaptable to different environments.

Native Regions in OK: 

NONE

Current and past designations: 

OWL

Present in OK?

Yes

Present in Bordering States?

TX, NM, MO, AR, LA

Has Legal Status in BS?

AR NW