Revision of Passiflora Subgenus Decaloba ... - Passion Flowers

342
Penal Colony, María Madre, Tres Marías Islands, Ferris 5598 (A, DS); Tres
Marías Islands; María Madre, Howell 10492 (CAS); Tres Marías Islands, María
Madre, Arroyo Honda, Mason 1172 (US); Cerro de la Cruz, E of Tepic, 1000 m,
Mexia 666 (UC). –OAXACA: Temazcal, Tuxtepec, MacDougal 4687 (FLAS);
Dto. Tuxtepec, cortina de la Presa Miguel Alemán, Temazcal, Martínez & Ramos
24029-A (MEXU). –EXACT LOCALITY UNKNOWN: Sessé & Mociño 4462
(AAU, F, GH).
Notes
As noted by MacDougal and McVaugh (2001), Passiflora obtusifolia is quite
variable in its vegetative morphology, especially in the depth of the leaf lobes, the
shape of the lobe apices, and the number of laminar nectaries. Despite its name,
the lobes of P. obtusifolia are commonly acute. The type is an illustration of an
unusual form that has only been collected again near Cerro de Ortega, Colima,
México (Lott 840), not far from the type locality. The type possesses shallowly
trilobed leaves with obtuse lateral lobes, rounded to emarginate central lobes,
and six laminar nectaries per leaf, with two glands situated proximal to the lateral
leaf veins (MacDougal & McVaugh, 2001).
As discussed under the description of P. mcvaughiana, P. obtusifolia is similar
to that species, which is also found in southwestern México. However, these
species differ in leaf shape, depth of lobing, number of laminar nectaries, number
of petiolar nectaries, pedicel length, sepal length, outer coronal length and
shape, seed size, and habitat. Passiflora obtusifolia also sometimes occurs very
near P. eglandulosa. At first glance these two species are somewhat similar