WEST LAFAYETTE, Ind. — People across the country are receiving unsolicited packages of unidentified seeds in the mail that seem to be coming from China. The Office of Indiana State Chemist, located at Purdue University, is urging Hoosiers not to plant or dispose of the seeds since they could be spreading noxious weeds, plant diseases or invasive species. Anyone in Indiana who receives a package is told not to open the seed packet and to mail it and any packaging materials to the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) Indiana office.