MULFORD EXPLORATION OF THE AMAZON VALLEY 



293 



On tlie Kio Ibon, 800 feet, Martin Cardenas, February 15, 

 1922 {no. .2080). "An erect shrub, about a meter high, in forest 

 shade, the flowers Avhite." The species is peculiar in its erect 

 habit and its tendency to trifoliohite leaves. 



Paullinia ribesiaecarpa 



Branchlets and inflorescence sparsely and very minutely 

 gray-pul)erulent, the branchlets slender, irregularly sulcate. 

 Petioles about 5 cm. long, more than twice the length of the 

 rachis, slender, lightly sulcate and angled. Leaflets 5, the peti- 

 olules 3 to 5 mm. long, the blades 4 to 8 cm. long, 1.5 to 3 cm. 

 broad, slightly inequilateral, lance-oblong, with acute base, 

 acutisli, or usually with a very abrupt, short obtuse point; some 

 entire, but mostly with several unequal obtuse teeth, with acute 

 sinuses, toward the summit, bright-green, thickish, the venation 

 stout ; 5 or 6 ascending secondaries on each side, falcate, Avith a 

 fine and strong intervening reticulation. Flowers not seen. 

 Nearly mature buds 1 mm. broad, subglobose, on short pedicels, 

 the panicles narrow and racemiform. Fruiting peduncles about 

 5 cuL long, slender, more than double the length of the fruiting 

 portion, the simple tendrils at its base, strongly flattened, cir- 

 cinate. Fruits with abruptly contracted pedicel-like base, crim- 

 son, mostly inequilateral, 8 mm. long and about as broad, finely 

 many-wrinkled, the summit mostly slightly depressed and bear- 

 ing 3 small styles. Seed solitary, brown, wrinkled, shining, 5 

 mm. broad, the basal half enclosed in a gray 2- to 3-lobed aril. 



Keyes, 1,000 feet, //. H. Rushy, November 12, 1921 {no. 1730). 



Ehamnaceae 



Karwinskia oblongifolia 



(Fruiting specimen.) Very finely and softly gray-tomentel- 

 late, the upper leaf-surfaces bright-green and subglabrous. 

 Branchlets slender, terete, ascending, leafy. Leaves opposite, 

 the stipules 1 or 2 mm. long, broadly ovate. Petioles mostly 6 to 



9 mm. long, slender, the margins strongly involute. Blades 5 to 



10 cm. long, 2 to 3.5 cm. wide, narrowly or broadly oblong, with 

 acute base and acute mucronate summit, entire, the slender mid- 

 rib and 10 or 12 pairs of secondaries mostly narrowly channeled 

 above, sharply prominent beneath, the straightish secondaries 

 ascending at an angle of about 45 degrees and connected by in- 

 numerable straightish tertiaries. Cymes short-peduncled, 2- to 

 4-fruited, the pedicels slender, about half as long as the fruits. 



