Revision of Passiflora Subgenus Decaloba ... - Passion Flowers

CHAPTER 6
CLADISTIC MORPHOLOGICAL ANALYSES
The cladistic analysis of the morphological data (Tab. 6.1-6.2) for supersection
Cieca and outgroups resulted in the generation of one equally parsimonious tree
of 548 steps, a consistency index (CI) of 0.429, a retention index (RI) of 0.526,
and a rescaled consistency index (RC) of 0.226 (Fig. 6.1-6.2). While only one
tree was found in the analysis, branch support is low for most of the tree. Only
six of the branches have bootstrap scores >50%, and only three have values
where some confidence can be obtained: the branch grouping P. arbelaezii L.
Uribe and P. lancetillensis J. M. MacDougal & J. Meerman has a bootstrap of
92%, the branch grouping P. lobbii Mast. ssp. lobbii and P. exoperculata Mast.
has a bootstrap of 95%, and the branch grouping P. itzensis and P. xiikzodz has
a bootstrap of 100%.
The presence/absence of petals (character # 45, state 2) was given a weight
of two in this analysis (all other characters having a weight of one) in order to
insure that the ingroup is resolved as monophyletic; the monophyly of the
supersection has already been confidently established (100% bootstrap value)
with molecular sequence data (see chapter 4). The monophyly of supersection
Cieca is supported by the following apomorphies: the absence of petals, styles
that are less than 6 mm in length (#15, 1), outer coronal filaments that are
commonly less than 5 mm in length (#8, 4), fewer than 35 filaments present in
the inner coronal row (#10, 2), staminal filaments that are frequently less than 5.5
110