Monographs Details: Passiflora nigradenia Rusby
Authority: Rusby, Henry H. 1927. Descriptions of New Genera and Species of Plants Collected on the Mulford Biological Exploration of the Amazon Valley 1921-1922. Mem. New York Bot. Gard. 7: 205-387.
Description:Species Description - Glabrous. Stems high-climbing, the branchlets stout, terete. Petioles to 4 cm. long, stout, strongly channeled, bearing 2 large black sessile glands just above the middle. Mature blades to 2 dm. long and 8 cm. broad, oblong or slightly broader below, with rounded or subtruncate base, the summit very abruptly contracted into a short acute point, the margin entire, thinly revolute; coriaceous, the upper surface slightly shining, the slender venation sharply prominent beneath, the secondaries 10 or 12 on each side, falcate-ascending, connected by a coarse anastomosis of the tertiaries. Flowers racemose, the racemes sometimes bearing as many as 10 flowTers, and shortly peduncled. Pedicels 3 cm. long, terete. Bracts borne close to the flower, sessile, nearly 3 cm. long and half as wide, ovate or oval, obtuse, bearing a pair of marginal glands close to the summit. Basal annulus of calyx slightly umbilicate, 1.5 cm. broad, sharply contracted into the calyx-tube, which is 1 cm. long. Calyx-lobes 3 cm. long, 12 mm. broad, lance-oblong, acutish, fleshy. Corolla two thirds the length of the calyx, the petals thin, about 1 cm. broad, lance-ovate, obtuse. Bases of petals and calyx-lobes bearing on their inner face a rather sparse circle of erect fleshy setae about 1 cm. long, of whitish color, transversely barred with black. Ligules of the crown very numerous and densely massed, about as long as the calyx, 3 or 4 mm. wide, flat, obtuse, colored like the setae above described, their connate portion about a fourth of the total length, and shortly fringed upon its inner surface. Gynostegium stout, 1.5 to 2 cm. long. Free portion of filaments about 1 cm. long, erect, strongly flattened. Anthers 1 cm. long, oblong, attached below the middle, becoming reflexed and inverted. Ovary shortly stipitate above the filaments, ellipsoidal, 7 or 8 mm. long. Style thick, half as long as the ovary, the two large globose stigmas coherent. Stipe of fruit 2 cm. long above the bracts, stout, annulate. Fruit nearly 1 dm. long, 8 cm. broad, regularly ellipsoid but umbilicate at the base, glabrous, edible, the epicarp soft.

Distribution:Bolivia South America|