Series 1: Planalto do Brasil, 1964-1975, undated

The Planalto do Brasil Project was founded and directed by Dr. Irwin from 1964 to 1972. It was a ten year collaboration between the NYBG and the Universidade de Brasilia to explore and collect in the plateau of south-central Brazil of the same name. By 1972 the program had collected over 225,000 specimens and over 30,000 numbers. Included in this series is the correspondence written and answered while on expedition, permits, budgets, supply lists, determinations and financial statements.