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



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Type Collection: A. Ducke 16532, "campinas sublonnens, Gurupa," Para, 

 Brazil, Sept. 1916 (HOLOTYPE US, isotypes G, P). 



Additional Specimens: BRAZIL: campina d'Arumateua, Rio Tocantins, Para, July 1916, 

 Ducke 16261 (US); in insulis Breves aestuarii amazonica prope flumen Macujurbimzinho, 

 Nov. 1922, Ducke 16943 (U); near mouth of Rio Embira, Amazonas, June 1933, Krukoff 

 4953 (A, F, G, MO, NY, U, UC, US). 



21b. Macrolobium campestre var. medium Cowan, var. nov. Figure 7. 



Arbor media, ad 20 m. atta, 30 cm. diametro, ramulis glabris vel raro sparse 

 puberulis. Petiolus 7-25 mm. longus. Folia 2-3-jugata, paripinnata et pseudo-im- 

 paripinnata; rachibus 20-60 mm. longis, teretibus ad subcanaliculatis. Petiolulis 

 3-6 mm. longis. Folioia 4.5-12 cm. longa, 2.5-5.5 cm. lata, ovata, lanceolata, vel 

 elliptica, ad basim acuta vel obtusa, ad apicem acuta ad acuminata. Inflores- 

 centiae 4-9 cm. longae, axe puberulo; bracteis 5.5-7 mm. longis, 1.5-2.5 mm. 

 latis, ellipticis vel lanceolato-ellipticis, puberulis. Hypanthium glabrum. Petali 

 lamina 4-5.5 mm. longa, 5-8 mm. lata, unguicilo 5.5-7 mm. longo. Ovarium glab- 

 rum vel margine sparsissime et minutissime puberulum, 3-4-ovulatum, gynophoro 

 3.5-4 mm. longo, sparse puberulo. 



Type Collection: A. Ducke (H.J.B.R. No.) 10926-A, "Belem do Para," Brazil, 

 April 1926 (HOLOTYPE US, isotype U). 



Additional Specimens: BRAZTL: Para: Aderson Camp near Tavio, Boa Vista, Rio Ta- 

 pajoz, April 1932, da Costa 325 (F,G); Tapana, Belem, June 1918, Ducke (H.A.M.P. No.) 

 17036 (H.J.B.R. No. 10926) (G, RB, U, US). 



Vernacular Names: Brazil: "igarana xixy," "igarana vermelha." 



21c. Macrolobium campestre var. campestre. Figure 7. 



Shrub with glabrous branchlets. Petioles 8-12 mm. long. Leaf blades 2-jugate, 

 paripinnate, the pairs 20-25 mm. apart; rachis 15-25 mm. long, slightly sulcate. 

 Petiolules 3*5 mm. long. Leaflets ovate to broadly elliptic, the base rotund-obtuse 

 to subcordate, the apex bluntly acute. Inflorescences branched from the base, 

 rarely lateral branchlets above the base, (6— )12— 14 cm. long, the axis densely pi- 

 lose to pilosulose, sessile; bracts 8-9 mm. long, 3.5-4 mm. wide, flexuose-pilose 

 on both surfaces, more densely so externally. Hypanthium sparingly puberulous. 

 Petal blade 4.5*5 mm. long, 7-7.5 mm. wide, oval transversely, the claw about 4 

 mm. long. Ovary glabrous, or puberulous on the abaxial margin, 3-ovulate, the 

 gynophore 2.5-3 mm. long, pilosulose, inserted at the top of the hypanthium. 



Type Collection: A. Ducke 8461, "campos a E. de Faro," Para, Brazil, Aug. 

 1907 (HOLOTYPE presumably at Museo Goeldi, isotypes F-frag., G). Material of 

 this genus has not been received for study from the Museo Goeldi at Belem, Brazil. 



Additional Specimens: BRAZIL: Para: Bas Trombetas, campina do Achipica, Sept. 

 1910, Dudke 10929 (G); Faro, campos a Test, May 1911, Ducke 11690 (G, US). 



21d. Macrolobium campestre var. arirambense Cowan, var. nov. 



Ramuli minute puberuli. Petiolus 10-20 mm. longus, leviter sulcatus. Foliorum 

 lamina 2-3-jugata, paripinnata; rachibus 15-40 mm. longis, leviter sulcatis. Fo- 

 lioia 4-6.5 cm. longa, 2-3 cm. lata, ovalia ad elliptica, ad basim obtusa, ad api- 

 cem abrupte acuta, extremitate acuta. Inflorescentiae 25-28 cm. longae, axe brevi- 

 pilosulo; bracteis 8 mm. longis, 3 mm. latis, elliptico-lanceolatis, acuminatis, in- 

 tus glabris, extus brevi-pilosulis; bracteolis glabris intus, extus pilosis. Flores 

 immaturi vel ab insectis vastati. Fructus (nimis maturus) circa 6 cm. longus, 3 

 cm. latus, oblongus, glaber, carpophoro 10 mm. longo, glabro. 



Type Collection: A. Ducke 14848, "campos do Ariramba, Rio Trombetas," 

 Para, Brazil, Sept. 1913 (HOLOTYPE G, isotype G). 



