Our research efforts focus on systematic and evolutionary
studies of various plant groups such as the Acanthaceae, Asteraceae,
Fabaceae, and Orchidaceae. In concert with traditional systematic
investigations we make extensive use of gene sequence data
and endonuclease restriction site data. We have a well-equipped
laboratory for molecular work. In addition, we are interested
in the Louisiana and Gulf Coast floras and conservation biology.
Selected Publications:
Urbatsch, L.E., B. Baldwin, and M.J. Donoghue. 2000. Phylogeny
of coneflowers and relatives (Heliantheae: Asteraceae) based
on nuclear rDNA internal transcribed spacer (ITS) sequences
and chloroplast DNA restriction site data. Systematic Botany
25: 539-565.
Urbatsch, L. E., R. P. Roberts, and V. Karaman . 2003. Phylogenetic
evaluation of Xylothamia, Gundlachia, and related genera (Asteraceae,
Astereae) based on 3ETS and ITS nrDNA sequence data. American
Journal of Botany 90: 634--649.
Roberts, R. P. and , L. E. Urbatsch. 2003. Molecular phylogeny
of Ericameria (Asteraceae, Astereae) based on nuclear ribosomal
3 ETS and ITS sequence data. Taxon 52: 209--228.
Mcharo, M., E. Bush, D. La Bonte, C. Broussard, and L. Urbatsch.
2003. Molecular and morphological investigation of ornamental
Liriopogons (Convallariaceae). Journal of the American Horticultural
Society 128: 575?577.
Roberts, R. P. and , L. E. Urbatsch. 2004. Molecular phylogeny
of Chrysothamnus and related genera (Asteraceae, Astereae)
based on nuclear ribosomal 3ETS and ITS nrDNA sequence data.
Systematic Botany . 29: 199--215.
Urbatsch, L. E. and R. P. Roberts. 2004. New combinations
in Gundlachia and four new genera of Astereae (Asteraceae).
Sida, Submitted.
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