2953] 



REVISION OF MACROLOBIUM 



321 



longus, glaber vel basim versus puberulus. Ovarium 1.5-2.5 mm. longum, 1-1.5 

 mm. latum, oblongum, marginibus minute puberulis, lateribus glabris, 2-3 - ovula- 

 tum, gynophoro 2-3.5 mm. longo, minute puberulo. 



Type Collection: A. Ducke 35194, "silva terris altis ad meridiem Parana do 

 Ramos, Parintins," Amazonas, Brazil, Jan. 1936 (HOLOTYPE US, isotype G, U). 



Additional Specimens: Rio Taruma, Manaos, Amazonas, Brazil, Jan. 1941, Ducke 1012 

 (IAN, NY, US); Bella Vista, Rio Tapajoz, Para, Brazil, Jan. 1918, Ducke 10913 (H.A.M.P. 

 No. 16912) (G, P, U, US); Mishuyacu, near Iquitos, Dept. Loreto, Peru, Dec. 1929, Klug 

 717 (F, NY, US). 



There is but slight variability in the aspect of the specimens cited above, but 

 Ducke 1012 shows several characteristics which are at definite variance with the 

 rest of the material. In spite of this it is assigned here, but its characters are not 

 incorporated in the description. It has pilosulose branchlets, shorter petioles, and 

 longer adaxial sepals. 



33d. Macrolobium suaveolens var. uaupesense Cowan, var. nov. Figure 11. 



Arbor parva, ramulis glabris. Petiolus 3 .5—6 mm. longus, glaber. Foliola 8-14 

 cm. longa, 3"5 cm. lata, subfalcata ad falcata, ad apicem abrupte acuminata vel 

 longo-acuminata, glabra, costa subsalienti, venulis obscuris ad subprominuiis. 

 Inflorescentiae 2-4 cm. longae, pedunculo circa 1.5 mm. longo; bracteis caducis, 

 circa 1 mm. longis, 1 mm. latis, triangularibus; pedicelli 2-2.5 mm. longi; brac- 

 teolis 5-6 mm. Iongis, 3-4 mm. latis, oblongis vel ovalibus, ad apicem rotundatis 

 apiculatisque, glabris intus, extus minuto-puberulis. Sepala adaxilia 1-2 mm. 

 longa, 0.5-1 mm. lata, triangularia, acuta vel acuminata, cetera 2.5-3.5 mm. longa, 

 1-1.5 mm. lata, lanceolata vel elliptica, acuta, glabra vel ad apicem ciliolata. 

 Petali lamina 3.5*5.5 mm. longa, 5-6.5 mm. lata, transverse ovalis vel suborbicu- 

 laris, unguicilo 4-7 mm. longo, nonnihii auriculato. Filamenta 19.5-21 mm. longa. 

 Stigma capitellatum. Stylus 16.5-22 mm. longus, glaber vel ad basim puberulus. 

 Ovarium 1.5-2.5 mm. longum, 1 mm. latum, oblongum, 2-ovulatum, marginibus pu- 

 berulis, lateraliter glabris, gynophoro 2-2.5 mm. longo, minute puberulo. 



Type Collection: R, Schultes & /. Fires 9069, "Taracua, Igarape da Chuva, 

 Rio Vaupes between Ipanore and confluence of Rio Negro, Amazonas," Brazil, 

 Nov. 1947 (HOLOTYPE US). 



Additional Specimens: BRAZIL: Amazonas: Sao Paulo de Olivenca, Rio Solimoes, Nov. 

 1940, Ducke 358 (Y) and Oct. 1931, Ducke 24065 (RB, US); Rio Uaupes, Taraqua, Nov. 

 1947, Pires 995 (IAN). 



33e. Macrolobium suaveolens var. suaveolens. Figure 11. 



Vouapa suaveolens (Spruce ex Benth.) Taub. Bot. Centralbl. 47: 394. 1891. 

 Vuapa suaveolens (Spruce ex Benth.) Kuntze, Rev. Gen. 1: 213. 1891. 



Shrub to 5 m. tall or small tree, the branchlets and leaves glabrous. Petioles 

 5-6 mm. long. Leaflets 8-11.5 cm. long, 3-4 cm. wide, falcate, the apex acumi- 

 nate with the extremity obtuse, the upper margin nearly straight, the lower arcu- 

 ate; costa plane above, salient beneath, the venules prominulous. Inflorescences 

 4.5-6.5 cm. long, the peduncle about 1 mm. long; bracts 1.5 mm. long, 1 mm. wide, 

 ovate, acuminate, glabrous except for the ciliolate margins; pedicels 1-3.5 mm. 

 long, sparsely and minutely puberulous; bracteoles 5-6 mm. long, 3-3.5 mm. wide, 

 oblong, minutely apiculate, glabrous within, externally minutely puberulous at 

 least on the apex and costa. Sepals dimorphic, the adaxial ones 1-1.5 mm. long, 

 about 1 mm. wide, triangular, acute, the others 2.5 mm. long, 1.5 mm. wide, ob- 

 long-lanceolate, acute, glabrous. Petal blade about 4 mm. in diameter, orbicular, 

 the claw 4 mm. long, broader at the base but not auriculate. Filaments 16 mm. 

 long. Stigma peltate. Style 11 mm. long, glabrous. Ovary 2 mm. long, 1 mm. wide, 

 glabrous, oblong, the gynophore 2.5 mm. long, pilosulose on the adaxial surface. 



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