In 2021, CPC contracted North Carolina Botanical Garden to recollect seed from a population currently held in long term orthodox seed storage as part of an IMLS-funded seed longevity experiment. The National Laboratory for Genetic Resources Preservation will evaluate how germination tested viability and RNA Integrity of seed lots decline over time in storage.
Known only from two nearby populations in small flood-scour areas between dammed pools along one river in North Carolina. Until it was rediscovered at the type locality in 1994, the species had not been seen in 100 years and was feared extinct. Large areas nearby had been inundated by a dam, but these two populations remained intact and should now be protected from future threats. Current threats include alteration of historical (pre-impoundment) flow regimes; alteration of habitat and potential loss of individuals through lead and PCB remediation work scheduled for 2009; additional alteration of habitat and competition with non-native invasive plant species; and some potential threats from recreational use of the river corridor.
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