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Abstract Detail


Pteridological Section/AFS

Matthews, Richard A. [1], Musselman, Lytton John [2], Taylor, W. Carl [3], Bray, Rebecca D [2].

Three new quillworts from the southeastern United States.

Richard A. Matthews1, Lytton J. Musselman1, W. Carl Taylor2, Kerry D. Heafner3 and Rebecca D. Bray1. 1Department of Biological Sciences, Old Dominion University, Norfolk, VA 23529. 2The National Science Foundation, Arlington, VA 22230. 3Louisiana Purchase Gardens and Zoo, Monroe, LA 71202. Three new quillworts from the southeastern United States. Rock outcrops have long been known for their distinct floras. Three diploid (2n) species of quillworts, Isoetes piedmontana (Pfeiffer) Reed, Isoetes melanospora Engelmann, and Isoetes tegetiformans Rury have been described as occurring in pools or along the margins of granite outcrops from the southeastern United States. Here we describe three new species of Isoetes: A once hypothesized intermediate between I. melanospora and I. piedmontana, occurring at 40 Acre Rock in Lancaster County, South Carolina now thought to have a role in the parentage of the I. hyemalis complex, based on molecular data; a tetraploid (4n) quillwort from Culverton Quarry, Hancock County, Georgia; and a new diploid species of quillwort endemic to sandstone outcrops of Broxton Rocks, Coffee County, Georgia.

Broader Impacts:


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1 - Old Dominion University, Biological Sciences, 110 Mills Godwin Building, Norfolk, VA, 23529, USA
2 - Old Dominion University, Department of Biological Sciences, Mills Godwin Building, 45th Street, Norfolk, Virginia, 23529-0266, USA
3 - National Science Foundation, Division of Environmental Biology, 4201 Wilson Boulevard, Arlington, Virginia, 22230, USA

Keywords:
Isoetes
Sandstone outcrops
Granite outcrops.

Presentation Type: Oral Paper:Papers for Sections
Session: 2
Location: 556B/Convention Center
Date: Monday, August 2nd, 2010
Time: 9:30 AM
Number: 2007
Abstract ID:389


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