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



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bei Santarem, 1927, Ginzberger 700 (F); Cachoeira Caranguejo, Rio Cauabury, Dec. 1930, 

 Holt & Blake 546 (GH, NY, US); Terr. Acre, ca. mouth Rio Macauhan, Aug. 1933, Krukoff 

 5599 (A, F, MO, NY, U, UC, US); Tres Casas, Municip. Humayta, Oct. 1934, Krukoff 6320 

 (A, F, MO, NY, U, US); Sao Paulo de Oiivenca near Palmares, Sept.-Oct. 1936, Krukoff 

 8403 (G, MO, U, US); Assahytuba, Rio Branco, Jan. 1924, Kuhlmann 1052 (H.J.B.R. No. 

 17663) (G, P, RB, U, US); Sao Marcos, upper Rio Branco, Sept. 1913, Kuhlmann 3243 (U, 

 US); Ega, Oct. 1831, Poeppig 2724 (P, W); Serra de Mel, Rio Branca, Surumu, Sept. 1909, 

 Vie 8147 (G, UC). 



PERU: Loreto: Mishuyacu near Iquitos, June 1930, Klug 1417 (F, NY, US); "stromg^ebiet^ 

 des Maronon von Iquitos aufwarts bis zur Santiago-Mundung de Manseriche ca. 77° 30 ' 

 West," 1924, Tessmann 3673 (F-frag., G, NY); Manfinfa on upper Rio Nanay, June-July 

 1929, Williams 1098 (F, US); Caballo-Cocha on Amazon River, Aug. 1929, Williams 2420 

 (F, G, US). 



COLOMBIA: Vicinity Miraflores, Ri'o Vaupes, Vaupes, Nov. 1945, Allen 3394 (MO, 

 US); Los Llanos, Rio Orinoco, Puerto Carreno, Vichada, Oct. 1938, Cuatrecasas 4008 (F, 

 US); bocas del Caruru, Vaupes, Sept. 1939, Cuatrecasas 7042 (F, US); Loretoyacu River, 

 Nov. 1946, Schultes & Black 8640 (US). 



VENEZUELA: Margin of Rio Orinoco, Chaffanjon s.n, (P). Bolivar: Mouth of Rio To- 

 noro, alto Rio Paragua, Aug. 1943, Cardona 815 (NY, US, VEN); Raudal Uraima, alto Rio 

 Paragua, Sept. 1943, Cardona 885 (F, NY, US, VEN); Rio Carom, from Kusaribara to mouth 

 of Rio Ikabaru, Sept. 1946, Cardona 1649 (VEN); banks of Rio Caroni and tributaries, Oct. 

 1947, Cardona 2182 (US, VEN); alto Ri'o Carom', Jan. 1949, Cardona 2564 (NY); Ri'o Para- 

 gua between Rio Tonoro and Salto de Auraima, April 1943, Killip 37541 (UC, US, VEN); 

 Ri'o Paragua, Dec. 1951, Maguire 32712 (F, K, NY, US, VEN); Ri'o Uairen, Sta. Elena, 

 Gran Sabana, March 1946, Tamayo 3180 (VEN); La Union, Rio Caura, Feb. 1939, Williams 

 11244 (F, US, VEN). Amazonas: Rio Cunucunuma, just above Playa Alta, Nov. 1950, Ma- 

 guire, Cowan & Wurdack 29504 (F, G, GH, IAN, K, MO, NY, U, US, VEN); San Carlos, 

 Rio Negro, Feb. 1942, Williams 14485 (F, US, VEN); Cano Macasi, Capihuara, alto Casi- 

 quiare, alt. 120 m., May 1942, Williams 15596 (F, NY, US, VEN). 



BRITISH GUIANA: Pomeroon Dist., Santa Rosa, Maruka R., Aug. 1921, de la Cruz 995 

 (GH, NY, US); Acqueero Landing, Pomeroon Dist., Sept. 1921, de la Cruz 1095 (GH, NY, 

 US); Baramanni R., NW Dist., Sept. 1921, de la Cruz 1137 (GH, NY, US); near Bartica on 

 Essequibo R., Sept. 1922, de la Cruz 1925 (F, GH, MO, NY, UC, US); Waramuri Mission, 

 Moruka R., Pomeroon Dist., Oct. 1922, de la Cruz 2583 (F, GH, MO, NY, UC, US); Waini 

 R., NW Dist., April 1923, de la Cruz 3738 (G, GH, MO, NY, UC, US); Assakatta, NW Dist., 

 Sept. 1923, de la Cruz 4373 (GH, MO, NY, UC, US); Mazaruni R., Oct. 1944, Fanshawe 

 2012 (F.D. 4748) (TYPE COLLECTION of M. acaciaefolium var. vesJLitum Sandw., HOLO- 

 TYPE K, isotypes BGF, F, NY, U, US); Apoteri, Rupununi R., July 1931, For. Dept. 2101 

 (BGF); Rockstone on Essequibo R., July 1921, Gleason 874 (GH, NY, US); Berbice, below 

 Koyeri Creek, Wurawa R., Canje R., Dec. 1914, Hohenkerk (F.D. No.) 685 (BGF); Deme- 

 rara R., Great Falls, June 1896, Jenman 7172 (NY); Mallali, Oct. 1924, Persaud 163 (F, 

 NY); Essequibo R., at first falls, Sept. 1929, Sandwith 222 (NY, P, U, US); Roraima, 1842- 

 43, Rich. Schomburgk 456 (P, W); British Guiana, Rich. Schomburgk 737 (P); British Gui- 

 ana, Rich. Schomburgk s.n. (U); Karenambo, Rupununi R. Basin, Oct. 1939, A. C. Smith 

 2231 (A, F, G, MO, NY, U, US, Y). 



SURINAM: Nickeri-Nanni Creek, Dohsen Savanna, Oct. 1941, Geyskes 124 and 126 

 (NY, U); Kaboerie Kreek, Nickerie, June 1916, Gonggrypp (For. Bur. No.) 2210 (U); Turco 

 Tabbetje, fluv. Marowijne, July 1923, Gonggrypp (For. Bur. No.) 5325 (U, US); Coppename 

 R., near Kaaimanstone, Sept. 1933, Lanjouw 704 (U, US); Corantijn, New R., Sept. 1935, 

 Rombouts 179 (MO, U); Litanie R., July 1937, Rombouts 712 (IAN, U); Corantyn near Wono- 

 tobo, Oct. 1916, Stahel & Gonggrypp (For. Bur. No.) 2534 (IAN, U); Kaboerie, Corantijn 

 R., Oct. 1916, Stahel & Gonggrypp (For. Bur. No.) 2988 (MO, U); fluv. Gonini, Aug. 1903, 

 Versteeg 120 (U). 



Vernacular Names: Brazil: "arapary," "faveira arapury," "parapari"; Peru: 

 "pashaquilla," "arapari"; Venezuela: "arepillo," "arepito." 



This is an extremely variable species within which there may even be some 

 subspecific taxa, but no constant characters have been discovered in this study 

 which could be used to distinguish them. 



In vesture there is marked variability. The leaflets are typically pubescent on 

 the costa on the upper surface and on the apical-lateral surface of the costa be- 

 neath. However, collections from eastern Peru and Colombia have the upper half 

 of the blades more or less pubescent beneath. This pubescence distribution might 



