CPC National Collection Plant Profile

Epithelantha bokei

Photographer:
Lynda Pritchett-Kozak

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CPC National Collection Plant Profile

Epithelantha bokei


Family: 
Cactaceae  
Common Name: 
button-cactus
Author: 
L. Benson
Growth Habit: 
Shrub
CPC Number: 
1610

Distribution
Protection
Conservation
References


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Epithelantha bokeienlarge
Photographer: Lynda Pritchett-Kozak


Epithelantha bokei is Fully Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 
Kathleen C. Rice contributed to this Plant Profile.

 
Epithelantha bokei


Epithelantha bokei is a beautiful, low growing cactus covered so densely with hair-spines that plants appear completely white. These cacti are partially submerged in the ground, with 2-3 cm of stem height above ground level (Correll and Johnson 1970). During drought periods, plants draw back down to ground level to conserve moisture. Flowers are a pale pink, very delicate and appear in July. Fruits are smooth, approximately 1 cm long and bright red.

Distribution & Occurrence

State Range
  Texas
State Range of  Epithelantha bokei
Habitat
  Plants can be found in locally dense groups on rocky, gravelly rounded limestone hilltops (USFWS 1983). Plants favor rocky, gravelly soils on flat areas (USFWS 1983).

Distribution
  Plants occurrences are scattered throughout the Brewster/Sanderson County area.

Number Left
  At this time, only sixteen sites have been documented (USFWS 1983).

Protection

Global Rank:  
G4T3
 
1/14/1999
Guide to Global Ranks
Federal Status:  
RT
 
1/19/1996
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  Mexico *FR83 8/26/1988  
  Texas S2 12/16/1987  

Conservation, Ecology & Research

Ecological Relationships
  Plants are associated closely with soil derived from only two or three types of specific limestone substrate (USFWS 1983).

Threats
  Threats to known occurrences include illegal collection and habitat degradation due to overgrazing and development (USFWS 1983).

Current Research Summary
  Desert Botanical Garden has over 100 of these plants in cultivation and has produced 2,000 seeds from these plants. (Desert Botanical Garden 2000)

Current Management Summary
  Management strategy varies from restriction of access to populations on private land, to none. Plants at Big
Bend National Park have suffered the recent impacts of illegal collecting.

Research Management Needs
  Additional surveys for new or historical populations are needed, especially in Mexico.

Ex Situ Needs
  More plants should be offered through horticultural trade to reduce wild collection pressure.

References

Books (Single Authors)

Correll, D.S.; Johnston, M.C. 1970. Manual of the vascular plants of Texas. Renner: Texas Research Foundation. 1881p.

Kartesz, J.T. 1993. Species distribution data for vascular plants of 70 geographical areas, from unpublished data files at the North Carolina Botanical Garden.

Kartesz, J.T. 1996. Species distribution data at state and province level for vascular plant taxa of the United States, Canada, and Greenland (accepted records), from unpublished data files at the North Carolina Botanical Garden.

Books (Sections)

Kartesz, J.T. 1999. A synonymized checklist of the vascular flora of the U.S., Canada, and Greenland. In: Kartesz, J.T.; Meacham, C.A., editors. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden. Chapel Hill, NC.

Electronic Sources

(2000). Center for Plant Conservation's National Living Collection--Profiles. Desert Botanical Garden. http://www.dbg.org/Collections/cpc.html. Accessed: 2002.

(2002). Botany: Investigator's Annual Reports. The National Park Service: Big Bend National Park. http://www.nps.gov/bibe/iar/botany.htm. Accessed: 2002.

Journal Articles

Figueira, J.E.C; Vasconcellos, N.J., Garcia, M.A.; Souza, A.L.T . 1994. Saurochory in Melocactus violaceus (Cactaceae). Biotropica. 26, 3: 295-301.

Nobel, P.S.; Geller, G.N.; Kee, S.C.; Zimmerman, A.D. 1986. temperatures and thermal tolerances for cacti exposed to high temperatures near the soil surface. Plant, Cell & Environment. 9, 4: 279-288.

USFWS. 1983. Review of plant taxa for listing as endangered or threatened species. Federal Register. 48, 229: 53640-53670.


  This profile was updated on 3/4/2010
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