There are around 2000 Lithop species indigenous to Southern Africa and Andrew van Ginkel in McGregor in the Western Cape, South Africa has them (almost) all. He is a collector pur sang with a huge greenhouse behind his 'humble tatched' McGregorian 'hut'. Andrew is globally known as one of the experts on the genus. His website http://www.lithops.co.za provides all indepth info about 'living stones'. Yesterday he published some photo's of flowering lithops. Here they are and enjoy! He also looks after the modest lithop collection of our own Soekershof.