Conservation genetics of Conradina glabra

Conradina glabra, or Apalachicola rosemary, is a federally listed endangered species that exists only on a small area of sandhill in Liberty County, Florida.

C. glabra bloom detail (3/4/2019) by Lila UzzellSoutheastern Center for Conservation at the Atlanta Botanical Garden

Conradina glabra flower

In the wild, scientists have noted that plants produce very few seeds, but small plants that resemble seedlings are commonly found. 

Conradina glabra habitat (3/5/2019) by Lauren EsermanSoutheastern Center for Conservation at the Atlanta Botanical Garden

Declining numbers

The last century's poor land management activities have resulted in declining populations of C. glabra. But this is changing... The area is now being restored to its original state. 

C. glabra bloom detail (3/4/2019) by Lila UzzellSoutheastern Center for Conservation at the Atlanta Botanical Garden

Getting it done

Through a grant from the U.S. Fish and Wildlife Service, the Garden is using molecular genetic techniques to understand whether C. glabra is reproducing clonally or via sexual reproduction as well as what factors encourage seed germination.

Melody Ray-Culp of USFWS monitoring C. glabra (3/7/2019) by Michael JenkinsSoutheastern Center for Conservation at the Atlanta Botanical Garden

Sampling Plants

In March of 2019, scientists from the Garden as well as volunteers from various organizations assisted with leaf tissue collection.

Volunteers monitoring C. glabra (3/7/2019) by Lauren EsermanSoutheastern Center for Conservation at the Atlanta Botanical Garden

Volunteers

Our volunteers helped with whole plant measurements, leaf sampling, gathering GPS locations, and tagging plants for future study.

Conradina glabra (3/27/2019) by Michael JenkinsSoutheastern Center for Conservation at the Atlanta Botanical Garden

What we found

Our initial genetic analyses have found that plants more than one meter apart are distinct individuals, rather than clones.

Lauren, Annie, and Mike monitor C. glabra (3/6/2019) by Melody Ray-CulpSoutheastern Center for Conservation at the Atlanta Botanical Garden

Seedbanking for the future

In 2021, Garden staff will return to Torreya State Park to collect seed of Conradina glabra. Seed viability and germination studies will reveal whether this species is reproducing on its own in the wild.

Credits: Story

Dr. Lauren Eserman

Credits: All media
The story featured may in some cases have been created by an independent third party and may not always represent the views of the institutions, listed below, who have supplied the content.
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