Campbell, C. S., M. F. Wojciechowski, B. G. Baldwin, L. A. Alice, and M. J.
Donoghue. 1997. Persistent nuclear ribosomal DNA sequence polymorphism in
the Amelanchier agamic complex (Rosaceae). Mol. Biol. Evol. 14: 81-90.
Sang, T., M. J. Donoghue, and D. Zhang. 1997. Evolution of alcohol
dehydrogenase genes in peonies (Paeonia): Phylogenetic relationships of
putative non-hybrid species. Molec. Biol. Evol. 14: 994-1007.
Baldwin, B. G., M. J. Sanderson, J. M. Porter, M. F. Wojciechowski, C. S.
Campbell, and M. J. Donoghue. 1995. The ITS region of nuclear ribosomal
DNA: a valuable source of evidence on angiosperm phylogeny. Ann. Missouri
Bot. Gard. 82: 247-277.
Campbell, C. S., M. J. Donoghue, B. G. Baldwin, and M. F. Wojciechowski.
1995. Phylogenetic relationships in Maloideae (Rosaceae): Evidence from
sequences of internal transcribed spacers of nuclear ribosomal DNA and its
congruence with morphology. Amer. Jour. Bot. 82: 903-918.
Wojciechowski, M.F., M.J. Sanderson, B.G. Baldwin, and M.J. Donoghue.
1993. Monophyly of the aneuploid species of Astragalus: evidence from
nrDNA internal transcribed spacer sequences. Amer. Jour. Bot. 80: 711-722.