Joseph H. Williams. In press. Developmental evolution of the progamic phase: Amborella trichopoda (Amborellaceae). American Journal of Botany.

Joseph H. Williams. 2008. Novelties of the flowering plant pollen tube underlie diversification of a key life history stage. Proceedings of the National Academy of Sciences, USA 105:11259-11263 abstract | full text | article in pdf format

Tatiana Arias and Joseph H. Williams. 2008. Embryology of Manekia naranjoana (Piperaceae) and the origin of tetrasporic, sixteen-nucleate female gametophytes in Piperales. American Journal of Botany 95(3): 272-285 abstract | full text | article in pdf format

William E. Friedman, Eric Madrid, and Joseph H. Williams. 2008. Origin of the fittest and survival of the fittest: relating female gametophyte development to endosperm genetics. International Journal of Plant Sciences 169(1):79-92 abstract | full text | article in pdf format

Joseph H. Williams and Kimberly S. Kennard. 2006. Microsatellite loci for the basal angiosperm Austrobaileya scandens (Austrobaileyaceae). Molecular Ecology Notes 6 (1): 201-203 abstract | full text | article in pdf format

William E. Friedman, and Joseph H. Williams. 2004. Developmental evolution of the sexual process in ancient flowering plant lineages. Plant Cell 16, Suppl. S.: S119-S132. full text article | article in pdf format

Joseph H. Williams, and William E. Friedman. 2004. The four-celled female gametophyte of Illicium (Illiciaceae; Austrobaileyales): implications for understanding the origin and early evolution of monocots, eumagnoliids, and eudicots. American Journal of Botany 91(3): 332-351. abstract | full text article | article in pdf format

William E. Friedman, William N. Gallup and Joseph H. Williams. 2003. Female gametophyte development in Kadsura: implications for Schisandraceae, Austrobaileyales, and the early evolution of flowering plants. International Journal of Plant Sciences 164(S5): S293-S305 abstract | full text article | article in pdf format

William E. Friedman, and Joseph H. Williams. 2003. Modularity in the angiosperm female gametophyte and its bearing on the early evolution of endosperm in flowering plants. Evolution 57(2): 216-230. full text article | article in pdf format

Joseph H. Williams, and William E. Friedman. 2002. Identification of diploid endosperm in an early angiosperm lineage. Nature 415: 522-526. full text article | article in pdf format

Joseph H. Williams, William J. Boecklen and Daniel J. Howard. 2001. Reproductive processes in two oak (Quercus) contact zones with different levels of hybridization. Heredity 87(6): 680-690. abstract | full text article | article in pdf format

Joseph H. Williams, Jr. and Michael L. Arnold. 2001. Sources of genetic structure in the woody perennial, Betula occidentalis. International Journal of Plant Sciences 162(5): 1097-1109. abstract | full text article | article in pdf format

M.J.W. Godt, J.L. Hamrick, M.A. Edwards-Burke and Joseph H. Williams. 2001. Comparisons of genetic diversity in white spruce (Picea glauca) and jack pine (Pinus banksiana) seed orchards with natural populations. Canadian Journal of Forest Research 31(6): 943-949. abstract | article in pdf format

Joseph H. Williams, Jr., William E. Friedman and Michael L. Arnold. 1999. Developmental selection within the angiosperm style: using gamete DNA content to visualize interspecific pollen competition. Proceedings of the National Academy of Sciences, USA 96(16): 9201-9206. abstract | full text article | article in pdf format

Michael L. Arnold, Mark R. Bulger, John M. Burke, Alice L. Hempel and Joseph H. Williams. 1999. Natural hybridization: how low can you go (and still be important)? Ecology 80(2): 371-381. abstract | full text article | article in pdf format

Daniel J. Howard, Ralph W. Preszler, Joseph H. Williams, Sandra Fenchel and William J. Boecklen. 1997. How discrete are oak species? Insights from a hybrid zone between Quercus grisea and Q. gambelii. Evolution 51(3): 747-755. article at JSTOR