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Physaria ludoviciana
 

Physaria ludoviciana, formerly known as Lesquerella (Brassicaceae), silvery bladderpod, is an Illinois-endangered perennial herb. It is found in south-central and southwestern United States with disjuncts within Illinois and Minnesota. In Illinois, L. ludoviciana is found in a dry sand prairie associated with a blowout on a large dune in the Henry Allen Gleason Nature Preserve in Mason County, Illinois.

 
 Images and Distribution:
 
   

  *Physaria photos and distribution maps courtesy of PLANTS National Database.

 
Key Findings:
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Colonies differ in size and seed production, but vigor of seed is similar.

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Seed maturity affects vigor.

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Seed vigor is consistent between years.

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Seed maintains vigor for at least two years.

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Can establish flowering plants in greenhouse.

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Photoperiod influences flower development.

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Preliminary greenhouse studies suggest that cross-pollination is required.

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Seeds do not exhibit dormancy.

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Large numbers of seed are produced each year at Henry Allen Gleason Nature Preserve.

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Comparisons are being made between Illinois and western populations.

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Students Involved (Eastern Illinois University):

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Jennifer Franklin (1999)

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Brent Todd (2001-2002)

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Students Involved (University of Illinois):

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Shannon Beach, University of Illinois (2000-2002)

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Ann Claerbout, University of Illinois (2001-2003)

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Christian Deters, University of Illinois (2000)