266 



MEMOIRS OF THE XEW YORK BOTANICAL GARDEX 



as long as the tube, the others triangular-ovate, obtuse. Petals 

 of the keel straight, oblanceolate, with rounded summit. All 

 petals of nearly equal length. Wings oblong with rounded sum- 

 mit, slightly curved, very abruptly contracted into the very slen- 

 der stipe, which is slightly more than one fourth the total length. 

 Body of vexillum about as long as that of the wing, but the stipe 

 only half as long as the stipe of the ^^^ng, and broader, the limb 

 emarginate, its breadth less than half its length. Stamens un- 

 equal, a little shorter than the petals, a little longer than the 

 style, distinct nearly to the base. 



Rurrenabaque, 1,000 feet, H. H. Rushy, October 19, 1921 {no. 

 1292). 



Machaerium foliosum 



Glabrous. Branchlets rather stout, densely leafy, coarsely 

 angled or suleate. Stipules 1 cm. or more long, linear-attenuate, 

 thin, finely nerved. Petiole about one third the length of the 

 rachis, both slender. Stipellae spiniform, 1 or 2 nmi. long, slen- 

 der, pungent. Petioles 2 or 3 mm. long. Leaflets mostly 9 or 11, 

 the lower smaller, from 4 to 8 cm. long, 2 to 3.5 cm. broad, oblong, 

 or slightly obovate, with rounded base and shortly mucronate 

 sunnnit, obscurely dentate with minute, salient teeth, thickish, 

 bright-green, the midrib stout and prominent beneath, the vena- 

 tion very slender and very finely reticulate, the secondaries about 

 8 on a side, widely spreading, then crookedly falcate. Panicle 

 terminal, sessile, pyramidal, decompound, densely flowered, the 

 inflorescence scurfy-puberulent and somewhat ferruginous. 

 Flowers very short-pedicelled, the bractlets linear-attenuate. 

 Calyx about 3 mm. long, and fully as broad, campanulate, the 

 teeth very short and broad, acutisli, the sinuses acute. Vexillum 

 about 1 cm. long and broad, the claw about a fourth of its length, 

 many-veined. "Wings a little longer than the vexillum. the claw 

 about a third of the length. Keel about equaling the wings, ob- 

 tuse, lightly incurved, the claw short, the limb shortly aurieulate. 

 Vexillar stamen free. Base of ovary long-acuminate, the style 

 long, strongly incurved. Fruit not seen. 



Rurrenabaque, 1,000 feet, H. H. Rnshij, October, 1921 {no. 

 826). "A large forest tree, with dark-blue flovrers." 



Machaerium rogaguense 



(Fruiting specimens.) Glabrous. Much-branched, the branch- 

 lets stout, short, densely leafy, apparently unarmed. Neither 



