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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 8, No. 4 



the savanna was pure white quartz sand and at the time the specimens cited were 

 collected it was covered by six to eight inches of water. 



37. Macrolobium pendulum Willd. ex Vogel, Linnaea 11: 412. 1837. Figure 11. 



Macrolobium racemigerum Tulasne, Arch. Mus. Par. 4:174. 1844. 

 Vouapa pendula (Willd. ex Vogel) Taub. Bot. Centralbl. 47: 394. 1891. 

 Vuapa pendula (Willd. ex Vogel) Kuntze, Rev. Gen. 1: 212. 1891. 

 Vuapa racemigera (Tul.) Kuntze, Rev. Gen. 1: 212. 1891. 



Tree 8-20 m. tall, the branchlets very minutely puberulous or rarely glabrous. 

 Stipules 5-12 mm. long, 0.5-1.5 mm. wide, persistent, linear to falcate-linear, cil- 

 iolate, acuminate. Petioles 4-12 mm. long, canaliculate, glabrous orvery minutely 

 puberulous on the upper surface; rachis rudiment 4. 5-10.5 mm. long, persistent, 

 acicular. Leaflets 5.5-11.5(-15) cm. long, 2-5(-6) cm. wide, arcuate-elliptic, the 

 base inequilateral, acute, the apex acute with obtuse extremity, glabrous or spar- 

 ingly and very minutely puberulous at the base of the upper surface, sometimes 

 punctate beneath; costa plane above, salient beneath, the venules prominulous to 

 prominent. Inflorescences 7-10.5 cm. long, glabrous, pendent, the peduncles 3-6 

 mm. long, the flowers distant, the buds lanceolate, acuminate; bracts 1.5-2 mm. 

 long, 1-1.5 mm. wide, caducous, oblong, acute, glabrous except for the ciliolate 

 margin; pedicels 7-12 mm. long; bracteoles 8.5-10.5 mm. long, 2-4.5 mm. wide, 

 lanceolate, acuminate, glabrous or sometimes sparsely puberulous within at the 

 base. Hypanthium 1-2 mm. long, sessile or on a 0.5 mm. long stipe, glabrous. Se- 

 pals four, 3.5-6 mm. long, 1-3.5 mm. wide, oblong, elliptic or lanceolate, the ad- 

 axial one obtuse, the others acute or acuminate, glabrous except for the tufted- 

 ciliate apices. Petal blade 4.5-5 mm. long, 6.5-7.5 mm. wide, transversely oval, 

 the claw 2.5 mm. long, auriculate basally, glabrous externally, villosulose within 

 on the claw and into the throat of the blade. Filaments 11.5-21 ram. long, gla- 

 brous. Stigma usually simple. Style 14-19.5 mm. long, glabrous. Ovary 2-3 mm. 

 long, 1-1.5 mm. wide, elliptic to oblong, glabrous, 2-ovulate; gynophore 3"3.5 ram. 

 long, glabrous, inserted at the apex of the adaxial wall of the hypanthium. Fruit 

 6-8 cm. long, 4-5.5 cm. wide, oval, glabrous, the carpophores 6-7 mm. long, gla- 

 brous. Seeds 1-2 per fruit, about 3.5 cm . long, 3 cm. wide, oval, the testa crus- 

 tose, venose. 



Specimens Examined: BRAZIL: Para: Belem, Aug. 1948, Addison s.n. (IAN); South 

 Forest of I. A. N., Belem, Dec. 1942, Archer 7956 (IAN); Rio Guama, Sao Miguel, Aug. 

 1948, Dardano & Black 48-3066 and 48-3085 (IAN); Arrayollos, April 1903, Ducke 3523 

 (G); Rio Cumina, Nov. 1907, Ducke 8889 (G); upper Rio Ariramba, Dec. 1910, Ducke 11321 

 (G); Rio Cumina, bas Trombetas, Dec. 1910, Ducke 11475 (G); alto Rio Ariramba, Oct. 

 1913, Ducke 14959 (G); Lago Curumun, Obidos, Ducke 15310 (BM, G); Arrayollos, regione 

 Almeirim, April 1923, Ducke 16934 (U); Maranhao, Assutina-Carutapera, Sept.-Dec. 1940, 

 Froes 11951 (NY, US); He Mexiana, Sept. 1901, Guedes 2375 (G); Broganca, Dec. 1899, 

 Huber 1710 (US); Ilha das Oncas, Belem, Sept. 1903, Huber 3842 (G); Rio Acara, Thome 

 Assu, tfist. Acara, Aug. 1931* Mexia 6050 (F, G, GH, MO, NY, U, UC, US); Para, 1929, 

 Moss 38 (US); "regionis Amazonicae indigenum, juxta Egam...," Poeppig 2889 (F, G, P) 

 (TYPE COLLECTION of M. racemigerum Tul.); Camera, Sept. 1903, Siqueira 3795 (G); 

 Belem, grounds of I. A. N., Jan. 1944, Silva 42 (IAN). Amazonas: Fozdo Jutahy, Nov. 

 1927, Ducke 20314 (RB); Municip. Humayra, near Tres Casas, Sept.-Oct. 1934, Krukoff 

 6162 (A, BM, F, MO, NY, U, US). 



Although the type of this species has not been available for study, Vogel's 

 description leaves no doubt of the identity of the group. Apparently he adopted an 

 herbarium name of Willdenow's, supplied it with a description, and attributed it to 

 the latter. 



This is one of the most distinct species of this section and is not likely to be 

 confused with any other group. The persistent stipules and rachis rudiment alone 

 are important distinguishing characters, but the pendent racemes of widely sep- 



