MULFORD EXPLORATION OF THE AMAZON VALLEY 



355 



small spheroid g'lands in the axil of each petiole, and occasion- 

 ally one on the internode. Petioles stont, pale, an<^led, 3 to 5 cm. 

 long-, the petiolules similar, nsually shorter, occasionally longer. 

 Leaflets usually 2, occasionally 3 or 1, extremely variable in size, 

 sometimes 15 cm. long by 10 em. broad, ovate or oval, with 

 rounded, truncate nr subcordate base and an extremely abrupt 

 acumination, which is obtuse or acutish and sometimes 2 cm. or 

 more long; entire, thin, bright-green above, pale or glaucous be- 

 neath, 5- to 7-ribbed, with several of the lower secondaries simi- 

 hir to the basal ribs, all slender and sharply prominent beneath, 

 connected by numerous slender tertiaries. Fruits shortly race- 

 mose, the peduncle and pedicels extremely stout, the pedicels 1 

 cm. or more long, the summits abruptly dilated, the disk hemi- 

 spheric. Pod to 2 dm. long, 4 cm. broad, oblanceolate, obtuse, 

 densely spiny, the spines brown, divaricate, about 5 nun. long, 

 acute. Seed brown, strongly compressed, 10 to 15 mm. broad, 

 obovate or subrotund, a ridge extending two thirds of its length, 

 the very thin hyaline wing very broad, surrounding both sides 

 and the summit. 



Eurrenabaque, 1,000 feet, Martin Cardenas, January 5, 1922 

 {no. 3063). 



Adenocalymna densiflora 



Inflorescence tomentellate ; otherwise glabrous. Branchlets 

 stout. Only the uppermost leaves seen, the common petioles 3 

 cm. long, stout, ascending, the upper surface plane, the petiolules 

 about as long. Leaflets 3, the blades 9 to 18 cm. long, 7 to 10 cm. 

 wide, ovate with rounded base, and very abruptly, shortly and 

 obtusely pointed summit, thin but rigid, the venation very slen- 

 der, slightly prominent on both surfaces, the secondaries 10 or 

 12 on each side, ascending at about 45 degrees, slightly curved, 

 connected by crooked tertiaries and by a loose reticulation. 

 Panicle long and stoutly peduncled, densely branched, the 

 branches angled. Pedicels slender, in flower about 1.5 cm. long. 

 Unopened calyx ovoid, acute or shortly mucronate, in flower 

 campanulate, 6 or 7 mm. long and equally broad or broader, cori- 

 aceous, the summit unequally and irregularly ruptured into 2 or 

 3 divisions. Corolla tomentose, 3.5 to 4 cm. long, the narrow 

 basal ventricose portion 1 cm. wide, the throat curved, the limb 

 2 em. broad. 



Cataracts of the Bopi River, 3,000 feet, H. H. Rushy, Septem- 

 ber 3, 1921 {no. 485). 



