The Botanical Research Institute of Texas holds at least one seed accession (collected in 2019) of Geocarpon minimum in orthodox seed storage at their facility.
The National Laboratory for Genetic Resources Preservation holds a back up seed lot of the 2019 Parker County, Texas collection for safety duplication under the CPC Material Transfer Research Agreement.
The Botanical Research Institute of Texas collected seed from three plants of Geocarpon minimum from a population in Parker, County Texas in April 2019.
MDC has worked for several years to relocate Geocarpon from an area of Collins Glade that was lost to expansion of HWY 13. Seeds of the destroyed site were transported to a protected area of Collins Glade. Monitoring of the project is done on an annual basis.
The Nature Conservancy conducts an annual census of Geocarpon on its Corry Flatrocks Preserve in SW Missouri.
Extant at about 40 sites in Missouri, Arkansas, Louisiana and Texas. Some sites are protected and appear to have good viability. Total population size is difficult to estimate.
Threats include destruction or adverse modification of the habitat, trampling and grazing by cattle, road expansions and improvements, overcrowding and shading by invading plants (USFWS 1993).
Known from approximately 27 sites in AR, LA, and MO. The majority of sites occur in Missouri (USFWS 1993). The number of individual plants at each site varies from year to year, ranging from 0 to hundreds or occasionally even a few thousand.
The Missouri Botanical Garden is currently (year 2002) working to assess the genetic diversity and differentiation present within and among Geocarpon populations across its range. Given the disparate nature of the habitat occupied by Geocarpon in Missouri versus Arkansas and Louisiana, there is interest in determining if there are subspecific differences between the MO and the AR and LA populations. Knowledge of these differences will assist in potential future reintroduction work.
The Nature Conservancy conducts an annual census of Geocarpon on its Corry Flatrocks Preserve in SW Missouri. The Missouri Dept. of Conservation (MDC) also monitors Geocarpon at several sites in SW Missouri. MDC has worked for several years to relocate Geocarpon from an area of Collins Glade that was lost to expansion of HWY 13. Seeds of the destroyed site were transported to a protected area of Collins Glade. Monitoring of the project is done on an annual basis.
Management needs include evaluating potential habitat and searching for additional populations and preserving genetic stock. Population monitoring should be continued.
Research needs include determining the effects of disturbance factors (natural and man-made) and incorporating findings into management prescriptions, establishing experimental populations to determine the presence of habitat specific factors and understanding reproductive biology and ecology.
Establish reliable propagation protocols.
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