One aspect of my research is directed to processes of reproduction in ferns
and other pteridophytes. We combine laboratory and field experiments to compare
species' reproductive success and relate this to their natural occurrence and
distribution. We are currently studying the role of gametophyte morphology,
including production of gemmae, in the ecology, reproduction, and dispersal of
fern species. Understanding the evolution and ecology of ferns provides insight,
in turn, to broader questions of plant geography and evolution. Another aspect
of my research studies the community composition and dynamics of Iowa forests,
and restoration of forest diversity.
Crane, E.H., D.R. Farrar and J.F. Wendel. 1995. Phylogeny of the Vittariaceae: Convergent simplification leads to a polyphyletic Vittaria. American Fern Journal 85:283-305.
Dassler, C.L., and D.R. Farrar. 1997. Significance of form in fern gametophytes: clonal, gemmiferous gametopytes of Callistopteris baneriana (Hymenophyllaceae). International Journal of Plant Sciences 158:622-639.
Chiou, W., and D.R. Farrar. 1997. Antheridiogen production and response in Polypodiaceae species. American Journal of Botany 84:633-640.
Farrar, D.R. 1997. Forest research in Iowa's State Parks - the values of natural diversity. Journal of the Iowa Academy of Science 104:39-42.
Chiou, W., and D.R. Farrar. 1997. Comparative gametophyte morphology of selected species of the family Polypodiaceae. American Fern Journal 87:77-88.
Farrar, D.R. 1998. The tropical flora of rockhouse cliff formations in the eastern United States. Journal of the Torrey Botanical Society 125:91-108.
Jungst, S., D.R. Farrar, and M. Brandrup. 1998. Iowa's forest resources. Journal of the Iowa Academy of Science 105:61-66.
Raich, J.W., D.R. Farrar, R.A. Herzberg, E. Sin, and C.L. Johnson-Groh. 1998. Characterization of central Iowa forests with permanent plots. Journal of the Iowa Academy of Science 106:40-46.
Norris, W.R. and D.R. Farrar. 1998. A municipal inventory and evalution of natural areas. Journal of the Iowa Academy of Science (in press).
Russell, A.E., T.A. Ranker, C. Gemmill, and D.R. Farrar. 1998. The interplay of sexual reproduction and vegetative growth in determining genetic diversity in Dicranopteris linearis clones on Mauna Loa, Hawai'i. Biotropica (in press).
Chiou, W.L., D.R. Farrar, and T.A. Ranker. 1998. Reproductive biology of some species of Elaphoglossum. Canadian Journal of Botany 76:1967-1977.
Russell, A.E., T.A. Ranker, C. Gemmill and D. Farrar. 1999. Patterns of clonal diversity in Dicranopteris linearis on Moana Loa, Hawaii. Biotropica 31(3):449-459.
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