272 



MEMOIRS OF THE Is'EW YORK BOTANICAL GARDEN 



mit, entire, thin, the venation very slender, scarcely prominent, 

 the principal secondaries about 5 on each side. Small racemes 

 terminating short branchlets or siihaxillary, the rachis nodose, 

 the branches minutely bracted. Calyx 8-glandular, subcori- 

 aceous. Fruit sparsely pilose, the carpels three. Wings cori- 

 aceous, the dorsal 1.5 to 2 cm. long, 4 mm. wide, extending equally 

 below and above the nutlet, both ends rounded, the lateral 1.5 

 cm. long, 1 cm. wide, the base broadly rounded, extending some- 

 what below the nutlet, the margin sinuate, the summit projected 

 above the nutlet and somewhat outward, the venation not promi- 

 nent. Nutlet large and thicE 



Rurrenabaque, 1,000 feet, M. Cardenas, November 24, 1921 

 {no. 1163). 



Mascagnia macrophylla 



Glabrous, except the miiuite jniberulence of the inflorescence, 

 the stems stout, terete, hollow. Stipules not apparent. Petioles 

 2.5 cm. to 4 cm. long, very stout, twisted, blackish-brown, nar- 

 rowly grooved al)ove, bearing a pair of oblong glands near the 

 summit. Blades 2 to 3 dm. long, 1.5 dm. wide, ovate or oval, with 

 rounded base and abrui:)tly short-acuminate and acute summit, 

 entire, thin, bright-green, somewhat shining above, the venation 

 slender, lightly prominent on both sides, the secondaries about 10 

 on each side, strongly falcate toward the margin, connected by a 

 loose reticulum. Panicles axillary, shorter than the leaves, 

 shortly and stoutly peduncled, their branches opposite, bracte- 

 ate, mostly subtended by small glands. Pedicels short and stout, 

 2-bracteolate near the summit, the bractlets gland-like. Calyx 10- 

 glandular, the glands small, basal, subglobular, the sepals fleshy, 

 erect, 2.5 mm. long and broad, with rounded summit. Petals yel- 

 low, 5 mm. long and broader, very shortly unguiculate, entire. 

 Stamens 10, monadelphous at the base, erect, short, fleshy, all 

 with anthers, the anthers short and very broad, the connective 

 short, thickened, verrucose. Carpels nearly distinct, pubescent, 

 the styles exceeding the stamens, stout, crooked, the stigma flat- 

 tened, broad, spreading. Fruit 7 cm. broad, 5 cm. long, very thin, 

 lustrous, pale-green, the Avings irregularly and shallowly crenate, 

 the principal nerves about 30 to 35, mostly forking at about two 

 thirds of the way to the margin. Dorsal wing about 5 mm. broad, 

 subsemicircular, extending equally above and below the nutlet. 



Flowering specimen : Ixiamas, 800 feet, M. Cardenas, Decem- 

 ber 18, 1921 {no. 1943). Fruiting specimen: Eurrenabaque, 

 1,000 feet, M. Cardenas, January 26, 1922 {no. 2044). 



