Howarth, D. G. and M. J. Donoghue. Duplications and expression
of DIVARICATA-like genes in Dipsacales. Mol. Biol. and
Evol. submitted Aug 2008.
Howarth, D. G. and M. J. Donoghue. 2006.
Phylogenetic Analysis of the “ECE” (CYC/TB1) Clade Reveals
Duplications Predating the Core Eudicots. Proc. Nat. Acad.
Sci. USA 103(24): 9101-9106.
Howarth, D. G. and M. J. Donoghue. 2005. Duplications in
CYC-like genes from Dipsacales correlate with floral form.
Int. J. Plant Sci. 166(3): 357-370.
Howarth, D. G. and D. A. Baum. 2005. Genealogical
evidence of homoploid hybrid speciation in an adaptive radiation of
Scaevola (Goodeniaceae) in the Hawaiian Islands. Evolution
59(5): 948-961.
Randell, R. A., D. G. Howarth, and C. W. Morden.
2004. Genetic analysis of natural hybrids between endemic and
alien Rubus (Rosaceae) species in Hawai’i. Conservation Genetics 5:
217-230.
Howarth, D. G., M. H. G. Gustafsson, D. A. Baum, and T. J.
Motley. 2003. Phylogenetics of the genus Scaevola
(Goodeniaceae): Implications for dispersal patterns across the
Pacific Basin and colonization of the Hawaiian Islands.
American Journal of Botany 90(6): 915-923.
Howarth, D. G., and D. A. Baum. 2002. Phylogenetic
Utility of a Nuclear Intron from Nitrate Reductase for the study of
closely related plant species. Molecular Phylogenetics and
Evolution. 23: 525-528.
Howarth, D. G., D. Gardner, and C. Morden. 1997.
Evolution and Biogeography of Rubus Subgenus Idaeobatus (Rosaceae)
in the Hawaiian Islands. Syst. Bot. 22(3): 433-441.