2011 Elizabeth Ann Bartholomew Award Recipient — Charles N. Horn

Author : Joe E. Winstead

Dr. Charles Norman Horn, Professor and Chair of the Department of Biology and Chemistry of Newberry College, Newberry, South Carolina, received the Elizabeth Ann Bartholomew Award on April 15th at the annual meeting of the Southern Appalachian Botanical Society (SABS) held in Huntsville, Alabama, in conjunction with the Association of Southeastern Biologists. This award, which …

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2011 Richard and Minnie Windler Award Recipient—Dwayne Estes

Author : Charles N. Horn

The 2011 Richard and Minnie Windler Award winner is Dwayne Estes for his paper ‘‘Viburnum bracteatum (Adoxaceae) expanded to include Viburnum ozarkense’’ (Castanea 75:277–293).

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Reproductive Ecology of Dirca palustris L. (Thymelaeaceae)

Author : Bryan J. Peterson

Additional Authors : William R. Graves

ABSTRACT Prevalence of sexual and asexual reproduction by plants influences genetic and spatial structure of populations. We investigated reproduction in five populations of Dirca palustris that span its distribution from Florida to North Dakota, and identified the contributions of sexual and asexual reproduction to the clustering of individuals that is characteristic of the species. In …

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Cinnamomum-Ardisia Forest in Northern Florida

Author : Andre Clewell

Additional Authors : John David Tobe

ABSTRACT Native old-field pineland with hardwood undergrowth was replaced 42 years later by alien hardwood forest dominated by invasive species at Goodwood forest in Tallahassee, Florida. Cinnamomum camphora dominated the overstory and Ardisia crenata the undergrowth. Succession theory would have anticipated development to native southern mixed hardwood forest or a subset called magnolia-beech forest. The …

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Floral Biology of an Alabama Population of the Federally Endangered Plant, Xyris tennesseensis Kral (Xyridaceae)

Author : Robert S. Boyd

Additional Authors : Allison Teem, Michael A. Wall

ABSTRACT Study of the pollination biology of endangered species can provide useful information for natural resource managers. We studied the floral biology of Xyris tennesseensis, a federally endangered species, at a site (Willett Springs) in north central Alabama. We described floral behavior and flowering phenology, supplemented pollen onto stigmas from self and outcross sources to …

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Germination of Two Seed Types from Three Dalea Species

Author : Brenda Molano-Flores

Additional Authors : Janice M. Coons Jason B. Cunningham

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Heterophylly of Didiplis diandra (Nutt. ex A.DC.) Wood (Lythraceae) and a Key to Some Rooted Shallow Water and Shoreline Herbs of the Mid-Atlantic Piedmont

Author : Charles N. Horn

ABSTRACT Didiplis diandra is a small shoreline aquatic plant scattered throughout eastern North America. In the Atlantic coast states from Virginia to Georgia it has been confused with other species that grow in similar habitats. Leaves of D. diandra are heterophyllous, submersed leaves average 15.4 mm long while emersed leaves average 6.3 mm long. A …

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Impacts of Nonpoint-Source Pollution on the Structure of Diatom Assemblages, Whole- Stream Oxygen Metabolism, and Growth of Selenastrum capricornutum in the Red River Watershed of North-Central Tennessee

Author : Jefferson G. Lebkuecher,

Additional Authors : Stacy M. Rainey, Chelsea B. Williams, Alex J. Hall,

ABSTRACT Assessments of stream biology are prerequisites to developing watershed management plans to improve ecological integrity. We sampled six streams in the Red River Watershed of North-Central Tennessee to evaluate the effects of non-point source pollution on diatom assemblages, primary production, and potential for excessive algal growth. We used diatom indices to assess the structure …

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Scientific Note: Invasion of a Southeastern Pine Savanna by Japanese Climbing Fern

Author : Ellen R. Leichty

Additional Authors : Becky J. Carmichael, William J. Platt

Lygodium japonicum (Thunb. ex Murr.) Sw. is an invasive fern in the southeastern United States. This perennial fern, which produces twining fronds from underground rhizomes (Clarke 1936), is native to open forests and forest edges in temperate, subtropical and tropical regions of eastern and southeastern Asia, East Indies, and northern Australia (Singh and Panigrahi 1984, …

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Survey and DNA Barcoding of Poaceae in Flat Rock Cedar Glades and Barrens State Natural Area, Murfreesboro, Tennessee

Author : Abby M. Drumwright

Additional Authors : Brian W. Allen, Krista A. Huff, Patricia A. Ritchey, A. Bruce Cahoon

ABSTRACT A survey of grasses from the Flat Rock Cedar Glades and Barrens State Natural Area in Murfreesboro, Tennessee was undertaken during the 2008 growing season with the goal of creating a comprehensive list of grass species living in a single glade environment. Twenty four different species were identified during the survey. All had been …

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