MULFOKD EXPLORATION OF THE AMAZON VALLEY 



279 



lu^nrly as Inroad, sliglitly concave at the base, acute with the short 

 style-base. 



A small forest tree at Kurrenabaque, 1,000 feet. Collected in 

 flower, //. H. Rushy, October 8, 1921 {no. 1592). The fruiting 

 specimens, Avhich have smaller leaves, were collected under the 

 number 1152. 



Mellvceae 



Guarea membranacea 



Glabrous, excepting a very minute puberulence on the flowers. 

 Branchlets very slender, reddish-brown, finely nerved. Petioles 

 to 4 cm. long in my specimen, slender, narrowly grooved, the 

 rachis to 10 cm. Leaflets 1 to 3 pairs, the petiolules 5 to 8 mm. 

 long, the terminal leaflets to 2 dm. long, 7 cm. wide, oval to 

 obovate, very abruptly contracted into a short, obtuse acumina- 

 tion, thin, pale-green, the slender venation slightly prominent 

 beneath, the secondaries 8 or 9 on each side, very slender, A\ddely 

 spreading, lightly falcate at the summit. Lower leaflets similar, 

 but much smaller. Panicles branched from the base or on long 

 slender peduncles, very lax and sparsely flowered. Flowers un- 

 opened in my specimen. Mature buds on pedicels 2 mm. long, 

 which are sharply angled, w^ith or without minute bractlets at or 

 above the base. Calyx broadly campanulate, 2 to 3 mm. wide, 

 the margin irregularly and very shallowly lobed, the calyx deep 

 purple-brown, thick, grayish-puberulent. Corolla-bud about 7 

 mm. long, obovoid with rounded summit. Stamen-tube 6 mm. 

 long, almost equaling the petals, the margin very shallowly 10- 

 crenate. Anthers sessile, 1.5 mm. long, reaching the summit of 

 the tube. Ovary 3 mm. long, nearly cylindric, 5-angled, the stout 

 style a little shorter, the stigma more than 1 mm. broad. 



Eurrenabaque, 1,000 feet, Martin Cardenas, November 25, 

 1921 {no. 1171). "A large tree in forest, the flowers pure 

 white. ' ' Species near G. Kunthii. 



Guarea Baxgii Rusby, Bull. Torrey Club 49 : 262. 1922. {Nos. 

 779, 1590, 2178.) 



Guarea albokosea Rusby, Bull. Torrey Club 49 : 263. 1922. 

 {No. 797.) This appears to be G. pendulispica DC. 



Trichilia Cardenasii 



Glabrous, but the slender branchlets roughened with minute 

 whitish papillae. Branchlets slender, gray-brown, finely 



