(1687) that , if one gets hold of the Common Nettle - of which the heads of the stinging hairs are all directed upwards - from the bottom upwards , there is little risk of being stung .This is not successful with the Small Nettle , where the heads of the stinging hairs point in all directions .inde hand gegeven , om die soodanig af te teijkenen , als hij die quam te sien .