Pontederiaceae

      Barrett S.C.H., and S.W. Graham. 1997. Adaptive radiation in the aquatic plant family Pontederiaceae: Insights from phylogenetic analysis. Pages 225258 in: T.J. Givnish & K.J. Sytsma (editors), Molecular Evolution and Adaptive Radiation, Cambridge University Press.
      Kohn J.R., S.W. Graham, B. Morton, J.J. Doyle and S.C.H. Barrett. 1996. Reconstruction of the evolution of reproductive characters in Pontederiaceae using phylogenetic evidence from chloroplast DNA restriction-site variation. Evolution 50:14541469.
      Graham S.W. and S.C.H. Barrett. 1995. Phylogenetic systematics of Pontederiales: Implications for breeding-system evolution. Pages 415441 in: P.J. Rudall, P.J. Cribb, D.F. Cutler & C.J. Humphries (editors), Monocotyledons: Systematics and Evolution, Royal Botanic Gardens, Kew.
      Graham S.W., J.R. Kohn, B.R. Morton, J.E. Eckenwalder and S.C.H. Barrett. 1998. Phylogenetic congruence and discordance among one morphological and three molecular data sets from Pontederiaceae. Systematic Biology 47:545-567.