SUPPLEhfENTARY NOTES ON THE AMERICAN SPECIES OF STRYCHNOS, XX. B. A. Krukoff Consulting Botanist of Merck Sharp & Dohme Research Laboratories, N.J., and Honorary Curator of New York Botanical Garden. In Supplementary Notes on the American Species of Stry-chnos X^ni I stated that for routine identification of Strychnos , two papers are needed: , American Species of Strychnos pub-lished in Lloydia 35: 193-271. 1972 and the Supplement ^17 pub-lished in Phytologia 41: 201-238. 1979. In the present paper I will summarize new information from Supplements ^18, 19, and 20, in connection with which 262 new collections were examined. 1) New Species and where they are expected Only S. davidsei was described as new. Up to date it was found in Venezuela (Apure) but is to be expected in Federal District, Lara, Sucre, and Amazonas from where we have only sterile material. I have nothing new to add to the description of regions where new species are expected to occur. 2) Extensions of Range 3. S. colombiensis has been collected for the first time in Vaupes, Colombia, 6. S^, rondeletioides in Amazonas, Venezuela, 9. S^, araguaensis in Piauhi, Brazil, 10. S. brachiata in Barinas, Venezuela, 12. S^, panamensis in Jalisco, Mexico, 14. S. dlvarl -cans in Bahia, Brazil, 19. S, toxifera in Los Rixis, Ecuador, 31. S^. peckll in Panama, Panama, 35. S. bredemeyerl in Apure, Venezuela, 36^. S^. mitscherllchii var mltscherllchii in Antio-quia and Bolivar, Colombia, 38, S^. darienensis in Delta Amacuro and Amazonas, Venezuela, 39, S_. guianensls in Apure, Venezuela and in Benl, Bolivia, 45, S, duckei in Acre, Brazil, 47. S. cogens in Benl, Bolivia, 49, S. parviflora in Mato Grosso, Brazil, 61, S_. pachycarpa in Choco, Colombia and in Surinam, 63. S. bra -chistantha in Chiapas, Mexico, 65, S. mattogrossensis In Apure, Venezuela, 70. S. tarapotensis in Apure, Venezuela and in Mato Grosso, Brazil, and 71. S. schnnkel in Los Rlos, Ecuador. 3) Corrections of range of Species 19. S. toxifera is not found in Bahia, Brazil, 20, S. tomentosa not in Venezuela, 33. S^. gardnert not in Maranhao, Brazil, and 25. S, pseudo-qulna not in Bahia, Brazil. 73
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