254 



MEMOIRS OF THE KEW YORK BOTAIs^ICAL GARDEN 



on the upper surface. Stipules waiitiii<^\ tlie <;la]ids small. Leaf- 

 lets sessile, 6 to 1.) cui. long, 2 to 6 cm. broad, the odd one nmch 

 smaller, inequilaterally lance-oblong, acuminate and acute at 

 both ends, entire, thin, pale-green, the venation very slender, 

 lightly prominent on both sides, the secondaries few, very un- 

 equal, connected by the loosely anastomosing tertiaries. Spikes 

 loosely flowered and raceme-like, solitary or fascicled from knots 

 upon the trunk and large branches, recurved or pendulous, 2 or 

 3 dm. long, shortly peduncled, the rachis very slender, the flowers 

 of a beautiful rose pink. Flowers solitary, sessile, with a very 

 small subulate bract. Calyx 1 nnn. long, the teeth very short, 

 acute. Corolla 7 or 8 mm. long, the tube 1 mm. thick, slightly 

 longer than the abrupt limb, which is more than twice as broad, 

 its lobes erect, triangular-ovate, acute, thickish, each 3-costate. 

 Stamens very numerous, very slender, their exserted portion 2 

 or 3 times as long as the corolla, united to about the middle, the 

 anthers very small, the base of the filaments adnate to the 

 corolla. Ovary oblong, 1.5 mm. long, the style rather stout. 



Bopi River, 3,000 feet, H. H. Rushy, August 10, 1921 {no. 

 568). A small tree on the river-bank, clothed with beautiful, 

 rose-pink, pendulous spikes, the flowers covered with ants so 

 small as to be scarcely visible. 



Pithecolobium bifoliolum 



Glabrous, the branchlets slender. Leaves 1-jugate, each peti- 

 olule (in the one leaf seen) bearing but one leaflet, the others 

 being suppressed so as to make the leaf apparently only once 

 pinnate. Petiole 1 cm. long, the petiolule a little shorter, the 

 glands small and obscure. Leaflets subequal, 18 cm. long, 8 cm. 

 wide, inequilaterally ovate, abruptly very short-acuminate and 

 obtuse at the summit, the broad base very abruptly contracted, 

 thin, pale-green, the venation very slender. Spike 4 dm. long, 

 slenderly peduncled, recurved, the rachis very slender, loosely- 

 flowered, recurved, the flowers minutely bracted, subsessile. 

 Calyx 1 mm. long, cupulate or urceolate, the teeth very small, 

 acute. Corolla 10 mm. long, the tube two thirds of the length, 

 the lobes ovate, acute, 3-ribbed. Exserted portion of the very 

 numerous, very slender stamens two or three times the length of 

 the corolla, the filaments connate for about half of their length. 



This is possibly a variety of the preceding, to which its habit 

 is very similar. It differs in its bi'oader, solitary leaflets, with 

 shorter petioles, and its longer flowers, the corolla-tube relatively 

 nuu'li longer. {Xn. 959.) 



