A revision of Passiflora L. subgenus Decaloba (DC.) Rchb. supersection Cieca (Medik.) J. M. MacDougal & Feuillet (Passifloraceae) Porter-Utley, Kristen PhytoKeys 2014 43 1 224 B0B27F46-1F75-54E1-B52B-3CC2F3B39FE7 K. Porter-Utley. Brittonia 59 (1): 25. figs 1 & 2. 2007. Magnoliopsida Passifloraceae Passiflora CoL Plantae Passiflora tacanensis Malpighiales 105 106 Tracheophyta species tacanensis   Type. Mexico. Chiapas: Mpio. Union Juarez, Volcan Tacana, entre Talquian& Tonina, 1700-2700 m, 7 May 1987, E. M. MartinezS. 20782(holotype: MEXU! [MEXU00665952]).  Description. Vine, pubescent with unicellular curved trichomes on petiole, adaxial leaf surface, and stipules 0.28-0.38 mm long, 0.03 mm wide, also minutely antrorsely appressed-puberulent throughout with unicellular, curved trichomes, 0.06-0.08 mm long, 0.02 mm wide. Flowering stems 1.5-1.8 mm in diameter, terete or somewhat compressed. Stipules 6.3-7.5 mm long, 2.5-3.5 mm wide, ovate, acute to acuminate; petioles 2.3-2.6 cm long, commonly bearing at or just below the middle (0.44-0.50 of the distance from the base toward the apex of the petiole) 2, elliptic, opposite to subopposite, sessile, discoid nectaries with the rims slightly raised, 1.0-1.1 mm wide (on the widest axis), 0.5-0.6 mm high. Laminas 3.8-5.3 cm long, 12.4-14.2 cm wide, membranous, subpeltate or slightly peltate (the distance from leaf base to point of petiole insertion 1.0-1.7 mm), transversely elliptic, 3-lobed 0.02-0.10 of the distance to the leaf base at the deepest sinus, lateral lobes 6.9-7.5 cm long, 2.6-4.2 cm wide, elliptic, acute to attenuate, central lobe elliptic or present as an obtuse to rounded tip, central vein 3.7-5.2 cm long (measured from point of petiole insertion to the leaf apex), angle between the lateral lobes 109-130°, ratio of lateral lobe to central vein length 1.41-1.86, margins entire, hyaline, primary veins 3, diverging and branching above base, laminar nectaries absent; tendril 0.7-0.9 mm wide, present at flowering node. Pedicels 11.9-13.0 mm long in fruit, 0.5 mm wide, paired in the leaf axils; bract(s) absent. Flowers not seen. Stipe 6.9-8.5 mm long in fruit, 0.5-0.6 mm wide. Berry 25.0-26.0 mm long, 24.0-26.0 mm in diameter, ellipsoid to globose, very dark purple. Seeds ca. 20, 4.6-4.9 mm long, 2.9-3.1 mm wide, 2.0-2.1 mm thick, obovate in outline, acute at both ends, reticulate-foveate with each face marked with ca. 22-26 foveae.  Phenology.Flowering and fruiting May.  Distribution.Mexico, in the state of Chiapas. Bosque mesofilode montana(montane moist forest), 1700-2700 m altitude.  Discussion.  Passiflora tacanensisis known only from the general type locality and though Martinez(  Martinez20782) states that the flowers are purple, the specimen does not possess flowers and I have not been able to locate any duplicates. It was found in montane mesophytic forests on Volcan Tacanain southwestern Mexico and was collected in May during the rainy season.    Passifloratacanensisis very similar to  Passiflora eglandulosa, which grows on adjacent volcanic cones in San Marcos, Guatemala. The mature leaves of  Passiflora tacanensisgreatly resemble the juvenile leaves of  Passiflora eglandulosaand are trilobed, with the middle lobe greatly reduced and widely obtuse to truncate. The laminae are also cordate and eglandular, and both of these species possess wide foliose stipules. However,  Passiflora tacanensispossesses petiolar glands positioned near the middle of the petiole, whereas  Passiflora eglandulosadoes not possess petiolar glands. In addition, the fruits of  Passiflora tacanensispossess more seeds and the chalazal and micropylar ends of the seed are inclined toward the raphe.   Specimensexamined. MEXICO. Chiapas:Mpio. Tapachula, Volcan Tacana. On trail between Talquianand the border of Guatemala, 1901 m, Porter-Utley et al. 436(KESC); Mpio. Tapachula, Volcan Tacana. On trail between Talquianand the border of Guatemala, 1857 m, Porter-Utley et al. 441(KESC).   Figure 47.Habit of  Passiflora tacanensis(based upon  Martinez20782) Scale bar = 1.0 cm.