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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[Vol. 8, No. 4 



surface. Filaments 10-12.5 mm. long, villosulose near the base. Stigma capitel- 

 late or only very slightly swollen. Style 10-12 mm. long, pilosulose basally. Ov ary 

 2-2.5 mm. long, 1-1.5 mm. wide, oval, (l-)2-ovulate, pilosulose marginally, the 

 lateral surfaces glabrous; gynophore 1.5 mm. long, pilosulose, inserted on the 

 base of the hypanthium. Fruit 5-7.5 cm. long, 3.5-4.5 cm. wide, oblong to oval, 

 glabrous or the margins sparsely pilosulose, the carpophores 2-7.5 mm. long, 

 sparsely pilosulose. Seeds one per fruit, 2-2.5 cm. in diameter, suborbicular, flat, 

 the testa membranous, irregularly venose. 



LECTOTYPE: R, Spruce 2408, "Falls of Sao Gabriel, igapo," Rio Uaupes, 

 Brazil, Aug. 1852 (deposited K, isolectotypes F-frag., G, GH, NY, P, US, W). 



Additional Specimens: BRAZIL: Ad flum. Casiquiari, Vasiva et Pacimoni, Jan. 1854, 

 Spruce 3330 (K, NY, P, W). VENEZUELA: Amazonas: Puerto Ayacucho, May 1940, Wil- 

 liams 13050 (F, US, VEN); Maroa, Ri'o Guainia, Feb. 1942, Williams 14251 (F, US, VEN); 

 Cano S. Miguel, Guainia, alto Ri'o Negro, March 1942, Williams 14880 (F, US, VEN); Rio 

 Sanariapo, above Raudal Maipures, July 1942, Williams 15976 (F, MOfrag., NY, US, VEN). 



Vernacular Names: Venezuela: "ahuiapa" (Baniba); "arepillo"; "arepito"; 

 "guape" (Quariqueno); "macuca" (Baniba). 



It was assumed by Bentham that the differences separating this taxon from 

 typical M. flexuosum were the greater density of pubescence on the leaflets and 

 its longer inflorescences and he considered it only as a variety. However, there 

 are additional differences which, with the ones he recognized, are adequate for 

 the recognition of it as a distinct species. M. molle is generally puberulous over 

 the upper leaflet surface, puberulous only on the costa in M, flexuosum; the rachis 

 of M. molle is shorter and bears fewer pairs of leaflets than that of M. flexuosum; 

 the peduncle of M. molle is 9-23 mm. long, in contrast to the 1-2 mm. one of its 

 relative; the typical variety of M. flexuosum has completely pubescent ovaries 

 which are 4-ovulate, whereas in M. molle the lateral surfaces are glabrous and the 

 ovary is 1-2-ovulate, as in var. parviflorum. 



The systematic position of this species is much nearer M. multiju gum than to 

 M. flexuosum; this alliance is most obvious in the relatively elongate peduncles 

 of both. M. molle differs from its nearest relative in having pilose branchlets, as 

 compared to glabrous, much longer petioles, and pubescent leaflets. 



14. Macrolobium jenmanii (Gleason) Sandwith, Lloydia 2: 185. 1939. Figure 5a. 

 Vouapa jenmani Gleason, Bull. Torrey Club 54: 609. 1927. 



Tree 3 m. tall, the branchlets puberulous, glabrescent. Petioles 8-15 mm. long, 

 subalate-canaliculate, pilosulose on the upper surface, glabrescent. Leaf blades 

 4-6-jugate, the pairs of leaflets 12-23 mm. apart, the rachis 5-10 cm. long, pilosu- 

 lose on the upper surface, glabrescent, glabrous beneath. Leaflets 3.5-10 cm. 

 long, 1-2.5 cm. wide, glabrous, oblong-lanceolate or lanceolate, the base inequi- 

 lateral, obtuse, the apex acute, mucronate; costa slightly impressed above, strongly 

 salient beneath, the venules prominulous. Inflorescences 5.5-8 cm. long, the axis 

 puberulous, the peduncle 2-3 mm. long; bracts 7 mm. long, 3 mm. wide, caducous, 

 ovate-lanceolate, ciliolate, glabrous within, puberulous externally; pedicels 2.5- 

 3.5 mm. long, puberulous; bracteoles 8 mm. long, 3.5 mm. wide, oblong-oblanceo- 

 late, sparsely villosulose within, puberulous externally, cuspidate. Hypanthium 

 1.5 mm. long, glabrous. Sepals five, the adaxial pair partly united, 4-5 mm. long, 

 1-1.5 mm. wide, linear, glabrous. Petal blade 5 mm. long, 7.5 mm. wide, trans- 

 versely oval, within villosulose in the throat, glabrous externally, the claw 5-8 

 mm. long, auriculate, glabrous externally, sparsely villosulose within. Filaments 

 about 22 mm. long, sparsely villosulose in the lower part. Stigma capitellate. Style 

 about 20 mm. long, with few basal hairs. Ovary 3 mm. long, 1.5 mm. wide, oblong- 

 oblanceolate, 2-ovulate, pilosulose on the margins, glabrous on the lateral sur- 



