The witness with an armed guard at Nanga Parbat, Himalayas

The witness at his residence in Davis, California

Marcel Rejmánek at a workshop organized by the Czech Botanical Society on the occasion of Professor Emil Hadač's 90th birthday, Prague 2004

The witness on a field research in South Africa, 2005

Marcel Rejmánek (on the right) and his collaborator Dave Richardson (in the middle) at a ceremony to present a chapter to the book "Invasive Alien Species, A New Synthesis" at Stanford University in July 2001, senior editor of the volume Hal Mooney (on the left)

Alexandr Hrabálek in 2019

Alexandr Hrabálek in 2019

Karel Soukup in 2022

Karel Soukup in 1955

Karel Soukup with his mum Emilie, January 1938

Karel Soukup with his older brother Vladimír and mother Emilie, Christmas 1938

Karel Soukup (fourth from left) at a Scout camp, 1946

Karel Soukup (centre) in the scout kitchen, 1946

A view of the scout camp that Karel Soukup attended in 1946

Karel Soukup (centre) with his siblings Emil (left), Vladimír (right) and Jan with their mum Emilie, 1948

Karel Soukup in 1952

Karel Soukup at his graduation ball, 3 November 1952

Karel Soukup at the graduation ball of his future wife Dana Matasová, second half of the 1950s

Photo taken during his compulsory military service in Žatec, 1957-1959

In typical Pilsen folk costume, 1960

Wedding photo of newlyweds Dana and Karel Soukup, 1960

With his wife Dana, 1960

Karel Soukup at the International Engineering Fair in Brno, 1966

With his wife Dana, 1980s

Karel Soukup (right) with his brothers, 1980