1953] 



REVISION OF MACROLOBIUM 



317 



long, 4 mm. wide, oval transversely, the claw 7 mm. long, alate but not distinctly 

 auriculate, glabrous externally, sparingly villosulose within on the claw. Fila- 

 ments 15 mm. long, sparsely villose basally. Stigma capitellate. Style about 12 

 mm. long, pilose basally. Ovary 2 mm. long, 1 mm. wide, oblong, pilose margin- 

 ally, the lateral surfaces glabrous, 3-ovuIate; gynophore 1.5 mm. long, pilosulose, 

 inserted at the apex of the hypanthium. Fruit unknown. 



Type Collection: A, Ducke (H.A.M.P. No.) 12294, "Cerro de Cupati, Ri'o Ja- 

 pura (Caqueta)," Colombia, Nov. 1912 (isotype G). 



There are apparently no very intimate bonds of relationship between this spe- 

 cies and any of the others of the genus. It has, rather arbitrarily, been placed near 

 the M. bifolium'M. angusti folium line for lack of a better disposition. It is one of 

 the more distinct species in this section and may be recognized quite readily by 

 the shape of its leaflets, which have deeply emarginate apices, well-developed 

 intramarginal nerves, and closely parallel, prominulous venules. 



FJG. 11. Geographic distribution of several species of Macrolobium. 



31. Macrolobium duckeanum Cowan, sp. nov. Figure 11. 



Arbor( ?), ramulis foliisque glabris. Petiolus 10-15 mm. longus, canaliculars, 

 glaber. Foliola 8.5-11.5 cm. longa, 4-6 cm. lata, valdissime inaequilateraiia, ar- 

 cuata, eiliptica, basis inferiore latere auriculato, superiore acuto, ad apicem acuta 

 et extremitate acuta vel obtusa, saepe inaequilaterali; costa saliens, venuli con- 

 spicui. Inflorescentiae 3.5-7 cm. longae, axe dense puberulo, pedunculo 2-5 mm. 

 longo; bracteis 2.5 mm. longis, 1.5 mm. latis, caducis, oblongo-ovatis, intus gla- 

 bris, extus dense puberulis; pediceili 2.5 mm. longi, dense puberuli; bracteolis 6 

 mm. longis, 3-4.5 mm. latis, oblongis vel ovalibus, concavis, apiculatis, intus 

 glabris, extus dense puberulis. Hypanthium 2 mm. longum, sessile, glabrum. Se- 

 pala quinque, duobus adaxilibus fere omnino conjugentibus, 4.5*5 mm. longa, 1.5- 

 2.5 mm. lata, oblonga, vel ovalia, acuta, concava, irregulariter ciliolata. Petali 

 lamina 5.5 mm; longa, 8 mm. lata, transverse ovalis, unguicilo late alato, petala 



