JOBSON1, RICHARD W*, VICTOR A ALBERT2, KENNETH M CAMERON3, AND JULIA PLAYFORD1. 1Department of Botany, University of Queensland, St. Lucia, Queensland 4072 Australia; 2Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama 35401 USA; 3The Lewis B. & Dorothy Cullman Program for Molecular Systematics Studies, The New York Botanical Garden, Bronx, NY 10458 USA. - Phylogeny of the carnivorous plant family Lentibulariaceae inferred from rps16 and trnL-F sequence data.
Phylogenetic relationships among 70 species of Lentibulariaceae,
representing all 3 recognised genera, were assessed by cladistic
analysis of plastid DNA sequences from the rps16 intron and the
trnL-F region. Sequence data from the two fragments were
analysed both separately and in combination. Consensus trees from all
analyses are congruent and jackknife results demonstrate
well-supported relationships within and between each of the three
monophyletic genera. The genus Pinguicula is sister to a
Genlisea-Utricularia clade, within which hierarchic structure
closely follows Taylor's recent sectional delimitations based on
morphology. Within Utricularia, sub-genus/section
Polypompholyx and section Pleiochasia together form a
lineage sister to two other Utricularia clades. The epiphytic
habit appears to have evolved at least two times within Utricularia,
in the section Phyllaria and within the closely related
sections Orchidioides and Iperua. The suspended aquatic
habit apparently evolved twice, within sections Utricularia and
Vesiculina, the latter of which includes some taxa that have
been assigned to the first. Two other sections were resolved as
paraphyletic: Benjaminia within section Oligocista, and
Avescaria within section Setiscapella.
Key words: Lentibulariaceae, molecular systematics, rps16, trnL-F