MULFORD EXPLORATION OF THE AMAZON VALLEY 



311 



very thin, riynophore 2 to 2.5 cm. lon^-. Free portions of fila- 

 nieiit-s ;> or 4 iiini. long, slender. Anthers 5 mm. long. Styles 

 strongly recurved, 6 mm. long, broader above. Stigmas 2 or 3 

 mm. long, inequilaterally oval, slightly nmcronate. Fimbriae 

 of the croAvn very numerous, slender, about 1 cm. long, apjjar- 

 eiitly 2-seriate. So far as I can judge from my one imperfect 

 flower, there is an inner crown, a little shorter than the outer, 

 which is multi-laciniate nearly to the base. Colors of flower 

 unknoAvn. 



Santa Ana de Yacuma, 700 feet, M. Cardenas, March 5, 1922 

 {no. 21 special). 



Passiflora nigradenia 



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 con- 

 tracted into a short acute point, the margin entire, thinly revo- 

 lute ; 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 anasto- 

 mosis of the tertiaries. Flowers racemose, the racemes some- 

 times bearing as many as 10 flowers, and shortly peduneled. 

 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 con- 

 tracted 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 sur- 

 face. 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, ellip- 

 soidal, 7 or 8 mm. long. Style thick, half as long as the ovary, 



