Monographs Details: Macrolobium suaveolens var. uaupesense R.S.Cowan
Authority: Cowan, Richard S. 1953. A taxonomic revision of the genus Macrolobium (Leguminosae-Caesalpinioideae). Mem. New York Bot. Gard. 8 (1): 257-342.
Family:Caesalpiniaceae
Description:Latin Diagnosis - 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 subprominulis. Inflorescentiae 2-4 cm. longae, pedunculo circa 1.5 mm. longo; bracteis caducis, circa 1 mm. longis, 1 mm. lads, triangularibus; pedicelli 2-2.5 mm. longi; bracteolis 5-6 mm. longis, 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, acutavel 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 suborbicularis, unguicilo 4-7 mm. longo, nonnihil 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 puberulis, lateraliter glabris, gynophoro 2-2.5 mm. longo, minute puberulo.

Distribution and Ecology - Additional Specimens: BRAZIL: Amazonas: Sao Paulo de Olivença, Rio Solimoes, Nov. 1940, Ducke 358 (Y) and Oct. 1931, Ducke 24065 (RB, US); Rio Uaupes, Taraqua, Nov. 1947, Pires 995 (IAN).

Discussion:

Type Collection: R. Schultes & J. Pires 9069, "Taracua, Igarape da Chuva, Rio Vaupes between Ipanore and confluence of Rio Negro, Amazonas," Brazil, Nov. 1947 (HOLOTYPE US).