326 



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



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apex. Sepals 18-22 mm. long, 3*6.5 mm. wide, oblong, obtuse, glabrous or sparsely 

 ciliolate. Petal blade 30-40 mm. long, 14-18 mm. wide, obianceolate, pilosulose 

 within on the costa in the basal portion, the claw 3-4 mm. long, puberulous toward 

 the base externally, pilosulose within; 1-3 petalodia sometimes present, linear, 

 acute. Filaments 30-35 mm. long, villosulose basally, the anthers 5.5-6 mm. long, 

 2-2.5 mm. wide. Stigma capitellate to capitate. Style 32-34 mm. long, glabrous. 

 Ovary 5-7.5 mm. long, 1.5*2 mm. wide, oblong, glabrous, (4-)6-8-ovulate, the free 

 portion of the gynophore 4.5-6.5 mm. long, glabrous. Fruit (immature) 11 cm. long, 

 2.5 cm. wide, oblong narrowly, glabrous, the carpophores 33 mm. long, glabrous. 



LECTOTYPE: F.C. Lehmann 8987, "haufig an den Ufern der Flusse Timbiqui 

 und Micay, 0-400 m.," Colombia, 1899 (deposited NY, fragmentary isolectotype 

 F). The holotype was on deposit at the Berlin Herbarium but it is assumed that it 

 was destroyed in the disastrous fires which occurred there during the last war. The 

 director of that institution has informed us that there is no material of this genus 

 in their herbarium. The New York sheet bears only two flowers but abundant vege- 

 tative material. A note on this sheet in Britton's hand states that the specimen in 

 the Kew Herbarium is undetermined, indicating that Harms did not annotate that 

 sheet nor is the New York sheet annotated by him. 



Additional Specimens: COLOMBIA: Dept. del Valle: Rio Yurumangui entre Isla de 

 Golondro y la Amargura, Feb. 1944, Cuatrecasas 16041 (US); Rio Cajambre, Ouebrada de 

 Ordonez, May 1944, Cuatrecasas 17267 (US); Rio Colima, Quebrada de la Brea, May 1946, 

 Cuatrecasas 21298 (F). Dept. del Choco: La Concepcion, 15 km. east of Ouibdo, May 

 1931, Archer 1954 (NY, US); headwaters Ri'o Tutunendo, east of Ouibdo, May 1931, Archer 

 2196 (NY, US); south of Rio Condoto, between Quebrada Guarapo and Mandinga, April 

 1939, Killip 35431 (US); Novita, Triana 4418 (NY, US) % 



ECUADOR: Prov. Esmeraldos: Selva Alegre up Rio Santiago to Playa de Oro, Little 

 6393 (NY). 



Vernacular Names: "chiparo dormilon," "dormilon." 



Of the specimens cited, only Killip 35431, a sterile collection, is in need of 

 further comment. It may represent a new species closely related to M. stenosiphon 

 or it may be a distinct subspecific taxon within the latter. The following char- 

 acters are discordant with the rest of the material: (1) branchlets pilosulose; (2) 

 stipules linear, 8.5 mm. long, 1 mm. wide; (3) 35"43 pairs of leaflets on a rachis 

 14-15 cm. long; and (4) leaflets 12-22 mm. long, 2-5 mm. wide. It is cited here in 

 spite of these differences, but its characters are not included in the description 

 of the species. 



This species with M. trinitense and M. colomhianum forms a distinct line of 

 relationship. The latter two are obviously related but M. stenosiphon is so utterly 

 different from either that it must stand alone, with no known close relatives. It is 

 readily^separable from the other two species by its larger number of leaflet pairs, 

 the shape of its leaflets and by the marginal sericeous band on the upper surfaces 

 of the latter. It also has a much longer hypanthium, calyx, and petal than the other 

 two species. 



40. Macrolobium colombianum (Britton & Killip) Killip, Caldasia 4: 213- 1946. 

 Figure 12. 



Shrub or tree to 15 m. tall, the branchlets glabrous, pilose, pilosulose, or pi- 

 losulose and puberulous. Stipules 5-25 mm. long, 1.5-8 mm. wide, persistent for 

 at least one season, foliaceous or not, subulate-lanceolate or narrowly to broadly 

 elliptic, acute, acuminate, dr caudate-acuminate, falcate or straight, glabrous or 

 more or less pilosulose or puberulous externally, the inner surface glabrous or pi- 

 losulose toward the base. Leaves 5-13-jugate, the pairs 6-22 mm. apart. Petioles 

 2-15 mm. long, subalate-canaliculate, pilose, pilosulose, puberulous, or pilosu- 

 lose and puberulous; rachis 4-14 cm. long, puberulous on the upper surface, mOst 



