(NCSC), Machado 2961 (MOL), Machado 2962 (MOL), Machado 2963 
(NCSC). DEPT. HUANUCO: PROV. LEONCIO PRADO: Pumahuasi, 
Fundo “Villa Gloria”, Experimental planting of Ing. Rodolfo Collantes, 830 
m., “coca de Trujillo”, 6 Apr 1976, Plowman 5828 (ECON, F, K, USM), 19 Jul 
1967 Machado 1051 (NCSC), Machado 1201 (NCSC), Machado 1214 (NCSC), 
Machado 1239 (NCSC); 20 Jul 1967, Machado 2573 (NCSC). 
LA LIBERTAD: Prov. Boliar: Laderas del Rio Marafion, Mar 1965, Machado 
2989 (MOL). Prov. Otuzco: Hacienda Collambay, between Simbal and La 
Cuesta, 800 m., 2 Sep 1973, Lopez & Sagastegui 7999 (GH): 850 m., 3 Mar 
1976, Plowman 5603 (ECON, F, UPS, USM), Plowman 5604 (ECON, F, 
USM), Plowman 5605 (ECON, F, USM), Plowman 5606 (B, ECON, F, USM, 
VT), Plowman 5607 (ECON, F, USM), Plowman 5608 (ECON, F, USM), 
Plowman 5609 (ECON, USM), Plowman 5610 (ECON, F, USM), Plowman 
5611 (ECON, F, USM), Plowman 5612 (ECON, F, K, NCU, USM), Plowman 
5613 (ECON, F, K, USM), Plowman 5614 (ECON, F, U), Plowman 5616 
(ECON, F). PROV. PATAZ: Rio Maranon, abajo de Pataz, 1400 m, 18 Aug 
1914, Weberbauer 7079 (MOL); Cerca del Rio Maranon, 18 Feb 1965, 
Machado 2987 (NCSC); Cerca de Tayabamba, orillas del Rio Maranon, 2 Mar 
1965, Machado 2934 (MOL), Machado 2935 (MOL); Cerca de Huancaspata, 
orillas del Rio Maranon, 15 Jan 1966, Machado 2929 (MOL); Prov. Trujillo: 
Laderas de la Vertiente Occidental, Mar 1965, Machado 1248 (NCSC); 
Hacienda del Sr. Lopez, 1965, Machado 1018 (NCSC); Simbal, El Sacra- 
mento, 580 m, 3 Mar 1976, Plowman 5600 (ECON, F, USM), Plowman 5601 
(ECON), F, USM), Plowman 5602 (ECON, USM), 17 Apr 1967, Ferreyra s.n. 
(ECON, USM), 16 Apr 1967, Ferreyra s.n. (USM); Simbal, La Banda, 
500-600 m, “tupa”, 17 Apr 1967, Ferreyra s.n. (ECON, USM); Simbal, San 
Lorenzo, 500-600 m, “tupa”, 16 Apr 1967, Ferreyra s.n. (ECON, USM); Sim- 
bal, Las Animas, “tupa”, “Coca de Trujillo”, 17 Apr 1967, Ferreyra s.n. 
(ECON, USM); Simbal, Fundo de Rosario Gutierrez, “tupa”, 17 Apr 1967, 
Ferreyra s.n. (ECON, F, USM); Simbal, 4 Mar 1976, Plowman 5618 (ECON, 
F, USM); 3 km. from Simbal, “tupa”, 16 Apr 1967, Ferreyra s.n. (ECON, 
USM). 
LIMA: Lima, Universidad Nacional Agraria de La Molina, Jardin Botanico, 
6 Apr 1975, Plowman 5209 (BH, ECON, F), 6 Feb 1976, Plowman 5388 
(BH, COL, ECON). 
ACKNOWLEDGMENTS 
Part of the research reported in this paper was conducted 
at the Botanical Museum of Harvard University under a con- 
tract with the U. S. Department of Agriculture (No. 12-14— 
1001-230). Post-doctoral fellowship support was also received 
from the Katharine A. Atkins Fund at Harvard University. 
Field work on Amazonian coca was carried out as part of 
Phase VII of the Alpha Helix Amazon Expedition 1976-1977 
and was funded by the National Science Foundation Grant 
No. 76-80874. 
I am particularly grateful to Professor R. E. Schultes of 
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