1953] 



REVISION OF MACROLOBIUM 



291 



faces; gynophore 2 mm. long, puberulous, inserted near the apex of the adaxial 

 wall of the hypanthium. Fruit 12.5-15.5 cm. long, 7.5*9 cm. wide, broadly oblong, 

 the adaxial margin subalate, glabrous, the carpophores 3*10 mm. long, glabrous. 

 Seeds 5 cm. long, 3.5 cm. wide, inequilaterally ovate, the testa sordid-brown with 

 reticulate black lines. 



Type Collection: G. 5. Jenman 4076, "upper Demerara R.," British Guiana, 

 Sept. 1887 (HOLOTYPE NY). 



Additional Specimens: BRITISH GUIANA: Waramuri Mission, Moruka R., Pomeroon 

 Dist., Oct. 1922, de la Cruz 2534 (F, GH, MO, NY, UC, US). 



Although M. jenmanii is probably properly situated in an advanced position in 

 the multijugate line of relationship, its exact kinship is difficult to determine. It 

 is not at all closely related to any of the species in this association but more 

 than likely represents a short, divergent line from the main line of relationship 

 which has ended blindly. It is easily distinguished by the shape and size of its 

 leaflets and especially by the dimensions of its legumes. The immensity of the 

 latter is rivaled only by the size of those of M. brevense but the two species are 

 very different otherwise. 



15. Macrolobium discolor Benth. in Mart. Fl. Bras. 15(2): 222. 1870. Figure 5b. 



Shrub or tree 2-5 m. tall, the branchlets pilosulose, or pilosulose and puberu- 

 lous. Stipules 5-6 mm. long, 0.5-1 mm. wide, subulate, acute to acuminate, early 

 caducous. Petioles 2-10 mm. long, shallowly canaliculate, pilosulose or pilosu- 

 lose and puberulous. Leaf blades 3-7-jugate, the pairs of leaflets 8-32 mm. apart; 

 rachis 2.5-10 cm. long, canaliculate to slightly sulcate on the upper surface, pi- 

 losulose or pilosulose and puberulous. Leaflets 1.5-7 cm. long, 0.5-3.5 cm. wide, 

 oblong, oblong-oval, or oblong-obovate, the base inequilateral, the upper side sub- 

 obtuse, obtuse, or cordate, the lower side subobtuse to obtuse, the apex rotund, 

 slightly retuse to emarginate, minutely apiculate; lustrous above, glabrous except 

 uncinate-puberulous on the costa, the lower surface pallid, glaucous, granulose- 

 ceriferous or not, glabrous, or the costa puberulous or sparingly pilosulose; costa 

 plane or impressed on the upper surface, salient beneath, the venules prominent. 

 Inflorescences 3-13.5 cm. long, terminal or axillary, the axis puberulous or pilosu- 

 lose and puberulous, the peduncle 2-6 mm. long; bracts 2.5-5 mm. long, 1.5-2 mm. 

 wide, lanceolate, triangular- lanceolate, or oblong-oval, ciliolate, puberulous ex- 

 ternally or only on the costa, glabrous within; pedicels 1-5 mm. long, puberulous 

 or pilosulose and puberulous; bracteoles 5.5-12 mm. long, 3.5-6 mm. wide, ellip- 

 tic or oval broadly, acuminate or caudate-acuminate, puberulous on the outer sur- 

 face, glabrous, sparsely puberulous, or strigulose within. Hypanthium 1-2 mm. 

 long, glabrous or more or less puberulous. Sepals five, free or the adaxial pair 

 somewhat united, sometimes dimorphic, lanceolate or oblong, acute to long-acumi- 

 nate, glabrous or more or less ciliolate. Petal blade 3.5-7 mm. long, 5-6 mm. wide, 

 transversely oval to suborbicular, glabrous, the claw 4-12.5 mm. long, villosulose 

 basally on the outer surface, glabrous or sparsely villosulose on the inner sur- 

 face, ciliolate basally. Filaments 20-25 mm. long, sparsely villosulose basally. 

 Stigma capitate to capitellate. Style 19-23 mm. long, lower part pilosulose. Ovary 

 1.5-3 mm. long, 1-1.5 mm. wide, linear to oblong, on the margins short-pilosulose, 

 pilosulose, or villose, the lateral surfaces glabrous, 2-6-ovulate; gynophore 2-3 

 mm. long, pilosulose or puberulous, inserted at any point between the base and 

 the margin of the adaxial hypanthial wall. Fruit (immature) 6-8.5 cm. long, 2-2.5 

 cm. wide, subfalcate-oblong, sparsely pilosulose on the margins, the carpophores 

 4-5 mm. long, pilosulose. Seeds 1.5 cm. in diameter, orbicular, the testa brown, 

 very thinly membranous. 



