In 2009 the presence of a potted Lithops plant of unknown identity on the veranda of a farmhouse alerted Tok Schoeman and Ronald Uijs to the fact that there might be Lithops on the farm that they were visiting at the time. Download

We learn how Lithops can retract under the soil during drought and become completely invisible to the naked eye, and consequently evade detection during surveys. Download

The results of many years of research into the group of Lithops schwantesii at 79 different locations are systematically evaluated, taxonomically assessed and presented. Download