plant biology of fossil plants and their use in phylogenetic analysis.
*Evolution of ferns, gymnosperms, and aquatic angiosperms.
trends in the Coniferales.
*Reproductive biology of the Araucariaceae and Podocarpaceae, including
fossil conifer groups.
*Anatomy and morphology of vascular plants.
* Tertiary plants from chert permineralizations: ferns, gymnosperms,
*Plant/fungal interactions in the fossil record; fossil mycorrhizae.