Revision of Passiflora Subgenus Decaloba ... - Passion Flowers

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longer filaments in their coronal rows. The seeds of P. tenuiloba are 4.1-5.8 mm
long, whereas those of P. pallida do not exceed a length of 3.5 mm.
Out of eighteen artificial self-pollinations carried out by MacDougal in the
greenhouse, only 3 set fruit. However, the seeds produced were generally small
or poorly developed. He was able to cross P. tenuiloba with P. pallida, P.
megacoriacea, P. juliana, and P. trinifolia.
Passiflora tenuiloba has been included in three other studies of
passionflowers. Benson et al. (1975) found that Agraulis vanillae (Gulf fritillary) is
an herbivore of this species. McCormick (1982) chromatographically screened
leaf samples of P. tenuiloba for flavonoids and did not find detectable levels of
flavonol 3-O-glycosides or C-glycosylflavones. Klucking (1992) found that the
leaf venation pattern of this species is similar to P. sexocellata and P.
eglandulosa and was classified as actinodromous and pinnate secondary
venation with irregular to regular intercostal venation consisting of lineate and
transverse veins. According to Klucking, the leaves of P. tenuiloba are more like
those of P. eglandulosa, because they have acute lateral lobes, an angle
between the lateral veins that is between 120 and 140°, and leaf bases that are
cordate.