Letters that Richard Evans Schultes, Curator of Botanical Museum Harvard University, sent to J. Cuatrecasas and his replies. The research line on Theobroma carried out by J. Cuatrecasas overlaps with some parallel studies of Theobroma of a student from Indonesia. Letter from AC Smith Charter, Director of the Museum of Natural History related to the same subject. J. Cuatrecasas visited Harvard University to study herbarium collections of Theobroma.

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