My whole name is Klaus Gilmer and as one of the two plant authors I am mainly responsible for text-/data-sections in this Homepage as well as for the taxonomy and systematics of the plants. I am biologist and professionally employed at environmental management.

With cactuses and also with other succulents I have occupied since 1975 and since middle of the 80s I am specialized on south American Opuntioids because of my fascination for their powerfull growth. And after I met Hans-Peter in 1987 it went worse with the Opuntias so that meanwhile 90% of my collection consists of them.

It might incidentally be mentioned that I am also interested in Gesneriads, too (the genera Sinningia or Rechsteineria).

Indeed, succulents are playing no supporting part in my life; however, my wife Katharina and my two sons Jonathan and Simon are always me more important for me.