Revision of Passiflora Subgenus Decaloba ... - Passion Flowers

Notes
337
Passiflora clypeophylla is known only from the type locality in Alta Verapaz,
Guatemala. Passiflora clypeophylla is distinctive in supersection Cieca because
of its large, conspicuously peltate leaves that are deltoid in general outline. The
flowers are not known to be borne in inflorescences and the pedicels are greater
than 16.8 mm long. The floral stipe of P. clypeophylla is also one of the longest
in the supersection and is greater than 9.4 mm long. In addition, the plant has
very shallow leaf lobes (0.03-0.07 of the distance from the leaf outline to the leaf
base).
Passiflora clypeophylla resembles both P. trinifolia and P. sexocellata, which
are somewhat similar vegetatively and also occur in Guatemala. Passiflora
clypeophylla is easily distinguished from P. trinifolia by its considerably narrower
stipules, the obtuse to rounded leaf lobes that are very shallow and the leaves
that are coriaceous as opposed to chartaceous in texture. The primary
difference between Passiflora sexocellata and P. clypeophylla is the ratio of the
lateral to central lobe length. Passiflora clypeophylla has lateral and central leaf
lobes that are nearly equal in length, whereas P. sexocellata has lateral lobes
that are commonly 1.3 to 2.8 times longer than the central lobes. Passiflora
sexocellata also commonly has a shorter central leaf lobe and more laminar
nectaries than P. clypeophylla. As with P. trinifolia, the lateral leaf lobes in P.
sexocellata are acute to attenuate as opposed to obtuse to rounded. The one
known flower of P. clypeophylla has fewer filaments in the outer coronal row (28
filaments) than either P. trinifolia (35-39 filaments) or P. sexocellata (40-50). The
staminal filaments in P. clypeophylla are nearly equal to the androgynophore