<prompt> Christian von Steven Russian - Khristian Khristianovich Steven; 19 Ndira 1781, muFredrikshamn, Finland 30 Kubvumbi 1863, muSimferopol, Crimea aive wekuFinland-akaberekerwa Russian botanist uye entomologist. Mubvunzo: Von Steven akafa riini?  <response>: 30 April 1863 