For many years, Shanidar 4 was thought to provide strong evidence for a Neanderthal burial ritual. Routine soil samples from around the body, gathered for pollen analysis in an attempt to reconstruct the palaeoclimate and vegetational history of the site, were analysed eight years after its discovery. In two of the soil samples in particular, whole clumps of pollen were discovered by Arlette Leroi-Gourhan in addition to the usual pollen found throughout the site, suggesting that entire flowering plants (or at least heads of plants) had been part of the grave deposit. Furthermore, a study of the particular flower types suggested that the flowers may have been chosen for their specific medicinal properties. Yarrow, cornflower, bachelor's button, St Barnaby's thistle, ragwort, grape hyacinth, horsetail and hollyhock were represented in the pollen samples, all of which have been traditionally used, as diuretics, stimulants, and astringents and anti-inflammatories. This led to the idea that the man could possibly have had shamanic powers, perhaps acting as medicine man to the Shanidar Neandertals.