Under copyright (with persmission of DKG)

Kakteen in Südamerika was written on the basis of the field notes of Ritter. These notes were written in a series of diaries that are proposed below. The first file presents a table of contents in German, the next files are the diaries. Most of the diaries were numbered consecutively by Ritter along the years. Some supplementary files, above 74, have been numbered arbitrarily; they contain various data like tables of contents of previous diaries, FR numbers, details about visited countries, etc.

These diaries provide some useful, new and personal informations that are not reported in Kakteen in Südamerika.