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



or oblong-oblanceolate, sparsely pilosulose basally on the margins, the carpo- 

 phores 8-10 mm. long, pilosulose. 



Type Collection: B. Maguire 24650, "overhanging upper Augustus Creek, Tafel- 

 berg, Surinam, " Sept. 1944 (HOLOTYPE NY, isotypes F, MO, U, US). 



Additional Specimens: BRITISH GUIANA: Makreba Falls, Kurupung River, Sept. 1938- 

 Feb. 1939, Pinkus 258 (F, G, GH, MO, NY, US). 



This species finds its nearest relative in M. acaciae folium, but it is amply 

 distinct both vegetatively and in its flowers and fruit. Its costa is strongly sali- 

 ent on both surfaces of the leaflets and its dark, shiny upper surface of the leaf- 



FIG. 4. Geographic distribution of M. acaciae folium. 



lets and the strongly glaucous under surface contrast sharply. In respect to the 

 flowers, the lanulose puberulence of the bracteoles is distinctive. The fruit of M. 

 acaciae folium is oval, oblong-oval or nearly orbicular, whereas those of M. longe- 

 racemosum are oblong and about three to four times as long as wide. 



8. Macro|pbium acaciaefolium (Benth.) Benth. in Mart. Fl. Bras. 15(2): 224. 1870. 

 Figure 4. 



Outea acaciaefolia Benth. Jour. Bot. Hook. 2: 94. 1840. 

 Vouapa acaciae folia (Benth.) Baill. Hist. PI. 2: 109. 1870. 

 Vuapa acaciaefolia (Benth.) Kuntze, Rev. Gen. 1: 213. 1891. 



Macrolobium acaciaefolium (Benth.) Benth. var. vestitum Sandwith, Kew Bull. 1948: 

 312. 1948. 



Tree with rather flattened, expanded crown, 3-30 m. tail, 8-100 cm. diameter, 

 the branchlets glabrous to densely pilosulose. Petioles (2-)6-7(-12) mm. long, 

 canaliculate. Leaf blades oblong, elliptic-oblong or lanceolate-oblong, (12-)15"20 

 (-28)-jugate, the pairs of leaflets (3-)5-7(-12) mm. apart; rachis (6.5~)10-14(-24) 

 cm. long, glabrous or the axis puberulous or pilosulose on the upper surface and 

 pilosulose beneath, the wings only cioliolate or the upper surface also puberulous 

 or pilosulose, glabrous beneath. Leaflets (7-)20-25(-40) mm. long, (2-)W(-ll) 



