CPC National Collection Plant Profile

Macroptilium supinum

Photographer:
Lynda Pritchett-Kozak

Heading for profile page
CPC Home Join now
About CPC
CPC National Collection
Conservation Directory Resources
Invasive Plant Species Plant News
Plant Links Participating Institutions
Contribute
Search CPC
Search    Alphabetical List    Reference Finder    CPC Home


CPC National Collection Plant Profile

Macroptilium supinum


Family: 
Fabaceae  
Common Name: 
supine bean
Growth Habit: 
Forb/herb, Vine
CPC Number: 
3382

Distribution
Protection
Conservation
References


Profile Links
 Tropicos
 PLANTS
 Fish & WildLife

Macroptilium supinumenlarge
Photographer: Lynda Pritchett-Kozak


Macroptilium supinum is Not Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 
Kathleen C. Rice contributed to this Plant Profile.

 
Macroptilium supinum


Macroptilium supinum, a perennial herb, is found in grass woodlands in Arizona and Mexico (Toolin 1982). This species has an unusual breeding syndrome. Flower and seed production occur both above and below ground. Below ground flowers remain closed and are obligate selfers (Buhrow 1983), not requiring pollinator services . Oddly, most seeds are produced in this manner, potentially acting as an inherent preplanting mechanism.

Distribution & Occurrence

State Range
  Arizona
Utah
State Range of  Macroptilium supinum
Habitat
  Plants prefer grassland and oak woodland habitats, which are threatened by overgrazing, off-road activity, development and reservoir construction (Pena Blanca Lake) (USFWS 1980).

Distribution
  The type locality for Macroptilium supinum is located 19 miles N of La Colorada, Mexico. The entire range of M. supinum ranges from Sonora and Nayarit north into Santa Cruz County, Arizona (Toolin 1980, 1982; USFWS 1995).

Number Left
  The total known U.S. population consists of approximately 1000 plants (Toolin 1982, Gori et al. 1990).

Protection

Global Rank:  
G2
 
1/20/1999
Guide to Global Ranks
Federal Status:  
 
2/28/1992
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  Arizona S1 8/1/2002  
  Sonora S1 7/8/1992  

Conservation, Ecology & Research

Ecological Relationships
  Unknown.

Threats
  Predation by rodents and grazing by cattle are the primary threats to this highly palatable species (USFWS 1980, Toolin 1980, 1982). Habitat degradation caused by grazing is a secondary threat (Toolin 1982).

Current Research Summary
  Desert Botanical Garden has only 116 seeds of Macroptilium supinum from two populations. Twelve plants were produced from a germination test using 25 seeds. The initial germination percentage was 88%, but some seedlings were lost due to damping off. Plants were placed in a greenhouse and were gradually nibbled away by an unknown animal, even in the greenhouse. A related species, M. atropurpureum, was grown from seed and plants were transplanted into the ground. Within 24 hours, the plants and caudexes were gone, presumably eaten by ground squirrels. (Desert Botanical Gardens 2000)

Current Management Summary
  Populations are monitored.

Research Management Needs
  A management plan controlling grazing would be useful. Fire ecology may be a useful management tool, but research is needed. Research needs include understanding seedling establishment and recruitment.

Ex Situ Needs
 

References

Electronic Sources

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

Journal Articles

Buhrow, R. 1983. The Wild Beans of Southwestern North America. Desert Plants. 5, 2: 67-71.

Delgado-Salinas A.; Torres-Colin, L. 1995. A new combination in Macroptilium (Fabaceae). Anales del Instituto de Biologia Universidad Nacional Autonoma de Mexico Serie Botanica. 66, 2: 189-191.

Rollins, W. 1943. Contrib. Dudley Herbarium. 30: 266-284.

Urban. 1928. Macroptilium Symb. Antill. 9: 457.

USFWS. 1980. Review of Plant Taxa Proposed for Listing as Endangered or Threatened Species. Federal Register. 45, 242: 85206.

USFWS. 1995. Notice of Reclassification of 32 Candidate Species. Federal Register. 60, 126: 34225-34227.

Reports

Gori, D.F.; Warren, P.L.; Anderson, L.S. 1990. Population studies of sensitive plants of the Huachuca, Patagonia and Atacosa Mountains, Arizona. Tucson, AZ: Prepared by The Arizona Nature Conservancy and Submitted to Coronado National Forest in completion of P.O. No. 40-8197-0-0215.

Toolin, L.J. 1982. Status Report for Phaseolus supinus. Albuquerque, New Mexico: U.S. Fish and Wildlife Service.

Toolin, L.J. 1987. Status Report for Phaseolus supinus. Albuquerque, New Mexico: U.S. Fish and Wildlife Service.


  This profile was updated on 3/4/2010
California
Oregon
Washington
Idaho
Nevada
Arizona
Utah
Montana
Wyoming
Colorado
New Mexico
North Dakota
South Dakota
Nebraska
Kansas
Oklahoma
Texas
Minnesota
Iowa
Missouri
Arkansas
Louisiana
Wisconsin
Illinois
Michigan
Michigan
Indiana
Ohio
Kentucky
Tennessee
Mississippi
Alabama
Florida
Georgia
South Carolina
North Carolina
Virginia
West Virginia
Pennsylvania
Delaware
Maryland
New Jersey
Connecticut
Rhode Island
Massachusetts
Vermont
New Hampshire
Maine
New York
New York
Hawaii
Hawaii
Hawaii
Hawaii