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



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mm. long, 8-13 mm. wide, lanceolate, the claw 4-6 mm. long, glabrous or sparingly 

 villosulose within on the lower part of the costa; one petalpdium sometimes de- 

 veloped, 15.5-17.5 mm. long, 2-5 mm. wide, linear or oblanceolate-spatulate, 

 acute or obtuse. Filaments 32-38 mm. long, glabrous, the anthers 4-4.5 mm. long, 

 2 mm. wide. Stigma capitate. Style about 20 mm. long, minutely puberulous at the 

 base. Ovary 2-4.5 mm. long, 1-2 mm. wide, oblong, densely puberulous on the 

 margins but only sparingly and minutely granular-puberulous on the lateral sur- 

 faces, 4-5-ovulate; free portion of the gynophore 1.5-3.5 mm. long, minutely pu- 

 berulous. Fruit unknown. 



Type Collection: G, Tessmann 4265, upper Maranon, mouth of the Rio Santi- 

 ago, 160 m., Peru, Oct. 1924 (fragment of HOLOTYPE F; a Tessmann collection 

 without collection number or data is deposited at NY and may be an isotype). 



Additional Specimens: Balsapuerto, Dept. Loreto, Peru, Jan. and May 1933, Klug 2863, 

 3046 (A, F, G, GH, MO, NY, US); Veneral, Rio Yurumangui, Dept. del Valle, Colombia, 

 Jan.-Feb., Cuatrecasas 15752 (F). 



This species, while exhibiting some relationship to M. stenocladum, is prob- 

 ably much more nearly allied to M. modicopetalum. From the latter M. ischnocalyx 

 maybe separated by its longer pedicels, bracteoles, hypanthium, sepals and petal. 

 Also, the sepals of this species are puberulous on the outer surface and its ovary 

 is minutely granular-puberulous laterally. 



The collection from Colombia is referred here with some reservation, for it ex- 

 hibits certain characteristics which do not conform with the bulk of the material 

 of this species. It appears to be a glabrous form, as the characteristic puberu- 

 lence of the hypanthium, sepals, and leaflet costa is lacking or nearly lacking. 



44. Macrolobium modicopetalum Schery, Ann. Mo. Bot. Gard. 30: 88. 1943* 



Tree 3-10 m. tall, the branchlets very minutely puberulous. Petioles 5-12 mm. 

 long, canaliculate, very minutely puberulous; petiolules usually present, to 4 mm. 

 long, minutely puberulous. Leaflets 14.5-26 cm. long, 5-9 cm. wide, equilateral, 

 elliptic, the base equilateral to inequilateral, acute, decurrent, the apex acumi- 

 nate to long-acuminate, the margin sometimes irregularly undulate; glabrous ex- 

 cept on the costa base on one or both surfaces, minutely punctate; costa salient 

 on both surfaces, the venules obscure to prominulous above, prominulous to promi- 

 nent beneath. Inflorescence 7-9 cm. long, cauliflorous, the axis very minutely pu- 

 berulous, the peduncle 3-4 mm. long; pedicels 0.5-1 mm. long; bracteoles 5.5-7.5 

 mm. long, 2.5"3.5 mm. wide, obovate, the apex rotund, sometimes slightly apicu- 

 late, glabrous within, very minutely puberulous externally. Hypanthium 3-4 mm. 

 long, on a stipe 0.5-1 mm. long, glabrous. Sepals 5-8.5 mm. long, 1-3.5 mm. wide, 

 oblong, obtuse, somewhat concave, glabrous or minutely ciliolate apically. Petal 

 11.5-13.5 mm. long, 5-7.5 mm. wide, lanceolate, sessile, basally pilosulose ex- 

 ternally, villose within in a broad band on the basal two-thirds of the costa. Fila- 

 ments 13.5-14.5 mm. long, sparsely pilosulose basally, the anthers 2.5 mm. long, 

 2 mm. wide. Stigma simple or slightly swollen. Style ca. 15 mm. long, puberulous 

 basally. Ovary 2.5 mm. long, 1 mm. wide, oblong to oblanceolate, appressed- 

 puberulous on the margins, glabrous laterally or very rarely totally glabrous, 3" 

 ovulate; free portion of the gynophore 1-2 mm. long, minutely puberulous or rarely 

 glabrous. Fruit unknown. 



Type Collection: H. von Wedel 2226, "Fish Creek, vicinity Chiriqui Lagoon, 

 Provincia de Bocas del Toro;" Panama, April 1941 (HOLOTYPE MO, isotypes 

 GH, US). 



Additional Specimens: Rio Dagua, Colombia, Lehmann 1129 (K); same locality as the 

 type, April and May 1941, von Wedel 2209 (GH, MO, US), 2291 (GH, MO), and 2399 (MO, 

 US). 



