CPC National Collection Plant Profile

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CPC National Collection Plant Profile

Cyperus grayoides


Family: 
Cyperaceae  
Common Names: 
Illinois flatsedge, Mohlenbrock's umbrella sedge, umbrella-sedge
Author: 
Mohlenbrock
Growth Habit: 
Graminoid
CPC Number: 
1227

Distribution
Protection
Conservation
References


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Cyperus grayoides is Fully Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 
Lindsey Parsons contributed to this Plant Profile.

 
Cyperus grayoides


This sedge is fairly abundant in the few locations where it occurs. It requires open and deep sand dunes that are regularly disturbed by a variety of factors. While development has clearly hurt this population, as has fire suppression, the impact of grazing depends a great deal on the animal doing the grazing. Grazing by domestic animals appears to hurt these plants (NatureServe Explorer 2002) while grazing by native wildlife seems to provide a form of disturbance that benefits the plants (IL DNR 2002). Natural disturbances have always been highly variable in their occurrence and C. grayoides has adapted by producing seeds that remain viable for at least 15 years in seed banks (IL DNR 2002).This plant reaches a full height of 8-48cm tall, with fibrous and slender roots. The leaves of this plant are grayish green, and has inflorescences of unequal umbel with spikes. The spikes come in clusters of 2-7, while each spike has 3-24 spikelets. This plant blooms from July to September in most places, although in Texas the plant can bloom from May until November, depending on rainfall. The fruit matures from mid-July to mid-August.

Distribution & Occurrence

State Range
  Illinois
Louisiana
Missouri
Texas
State Range of  Cyperus grayoides
Habitat
  This sedge is found in disturbed dune areas including open dune sand to open sandy spaces in early successional sand prairie and blowouts in more established dunes. This species is occasionally found along disturbed roadsides but this is very rare (IL DNR 2002).

Distribution
  Arkansas, Illinois, Louisiana, Missouri, and Texas (NatureServe 2001).

Number Left
  C. grayoides is found in 6 counties in Illinois, 3 counties (with 4 populations) in Missouri, 21 counties in Texas, 4 parishes in Louisiana, and 4 sites in the National Texas Forest.

Protection

Global Rank:  
G3
 
12/11/1997
Guide to Global Ranks
Federal Status:  
SC
 
11/1/1993
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  Illinois S1 LT 8/9/1989  
  Louisiana S1 R 12/9/1988  
  Missouri S2 E 6/18/1991  
  Texas S3 2/20/1992  

Conservation, Ecology & Research

Ecological Relationships
  Unknown.

Threats
  Residential development
Agriculture
Fire Suppression
Reduction in native grazing ungulates (IL DNR 2002)
Grazing by domesticated animals (NatureServe 2001)

Current Research Summary
  None known.

Current Management Summary
  Restoration suitable habitat in several national forests in Texas is currently underway after severe storm damage that occurred in 1998. (Turner 1999)
The Illinois DNR Division of Natural Heritage is monitoring a population located in a nature preserve in Mason County. (IL DNR 2002)

Research Management Needs
 

Ex Situ Needs
 

References

Books (Single Authors)

2000. Missouri Plants of Conservation Concern. Jefferson City, MO: Conservation Commission of Missouri--Missouri Department of Conservation.

Herkert, J.; Ebinger, J.E. 2002. Endangered and threatened species of Illinois: Status and distribution. Springfield, IL: Illinois Endangered Species Protection Board. 161p.

Electronic Sources

ILDNR. (2002). Plant species biology summaries. Illinois Department of Natural Resources, Division of Natural Heritage, Botany Program. http://dnr.state.il.us/conservation/naturalheritage/botany/botany.htm. Accessed: 2002.

NatureServe. (2008). NatureServe Explorer: An online encyclopedia of life [web application]. [Internet].Version 7.0. NatureServe, Arlington, Virginia. http://www.natureserve.org/explorer. Accessed: (June 17, 2008).

Journal Articles

Carter, R.; Bryson, C.T. 1991. A report of Cyperus grayioides and Cyperus retroflexus (Cyperaceae) new to Missouri and notes on other selected Missouri Cyperus. Sida. 14: 475-481.

Logan, J.M. 1996. Results of a field survey for Cyperus grayoides (Cyperaceae) in Arkansas. Sida Contributions to Botany. 17, 1: 283-286.

Schwegman, J.E. 1988. Illinoensis. Newsletter of the Illinois Native Plant Conservation Program. 4, 1: 4?.

Turner, R. 1999. A severe windstorm creates opportunities for ecosystem restoration in Texas national forests. The Nature Conservancy Newsletter--Horizon. 24, 2

USFWS. 1976. Proposed Endangered Status for 1700 U.S. Plants. Federal Register. 41: 24523-24572.


  This profile was updated on 3/4/2010
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