CPC National Collection Plant Profile

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CPC National Collection Plant Profile

Sisyrinchium dichotomum


Family: 
Iridaceae  
Common Names: 
reflexed blue-eyed grass, white irisette
Author: 
Bickn.
Growth Habit: 
Forb/herb
CPC Number: 
7705

Distribution
Protection
Conservation
References


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Sisyrinchium dichotomum is Not Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 

 
Sisyrinchium dichotomum


This species is a narrow endemic found only at four sites in the upper piedmont region of North Carolina. These populations are extremely threatened. Two of them are within highway rights-of-way and another is in an area that was planned for residential development by the private owners. This last population is sadly the largest containing about a thousand plants. One of the populations is on public land maintained by the NCDOT which may be this species only hope of survival. This irisette has only held on in areas that are regularly disturbed such as power line maintenance (without the use of herbicide) and road maintenance areas. Unfortunately road maintenance is known to hurt these plants so artificial disturbance is clearly not as good as the original natural disturbance that this species relied on (probably fire and grazing by native animals). (USFWS 1990, NatureServe 2001)

Distribution & Occurrence

State Range
  North Carolina
State Range of  Sisyrinchium dichotomum
Habitat
  Rich, basic soils in clearings and the edges of upland woods where the canopy is thin and where erosion has removed the deep little layer typical of these sites. (USFWS 1990)

Distribution
  Polk, Henderson and Rutherford Counties, N.C. (USFWS 1990), and Greenville County, S.C.

Number Left
  There are only four sites left consisting of less than 1400 individuals. (USFWS 1990) 1 population of < 100 individuals (Chimney Rock, NC) 1 population of ca. 100 individuals (Pacolet River, NC) 1 population of ca. 200 individuals (Sugarloaf Mountain, NC) population of ca. 1000 individuals (White Oak Mountain, NC)

Protection

Global Rank:  
G2
 
7/16/2004
Guide to Global Ranks
Federal Status:  
LE
 
10/24/1996
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  North Carolina S1 E 10/31/1991  

Conservation, Ecology & Research

Ecological Relationships
  Unknown.

Threats
  Road maintenance
Erosion along steep roadbanks
Natural succession due to fire suppression
Residential and industrial development
Removal of the tree canopy
Trampling by tourists
Herbicide use
Highway expansion and improvements
Invasive non-natives
(USFWS 1990)

Current Research Summary
  None known.

Current Management Summary
  A recovery plan was written in 1995.

Research Management Needs
 

Ex Situ Needs
 

References

Books (Single Authors)

USFWS. 1994. Agency draft recovery plan for white irisette (Sisyrinchium dichotomum) bicknell. Atlanta, Ga.: U.S. Fish & Wildlife Service. 31p.

Electronic Sources

(2002). NC-ES Plant profiles. [Web pages] North Carolina Ecological Services--U.S. Fish & Wildlife Services--Southeast Region 4. http://nc-es.fws.gov/plant/plant.html. Accessed: 2002.

Journal Articles

USFWS. 1990. Proposed Endangered Status for the Plant Sisyrinchium dichotomum (White Irisette). Federal Register. 55, 245: 52191-52193.

USFWS. 1991. Determination of Endangered Status for the Plant Sisyrinchium dichotomum (White Irisette). Federal Register. 56, 187: 48752-48755.

Reports

USFWS. 1995. Recovery plan for white irisette (Sisyrinchium dichotomum) Bicknell. Atlanta, Ga.: U.S. Fish & Wildlife Service. p.22.

Theses

Hornberger, Kathleen Lee. 1987. Systematics of the genus Sisyrinchium (IRIDACEAE) in the southeastern United States. [Ph.D. Thesis]: University of Arkansas. 346p.


  This profile was updated on 3/4/2010
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