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Ritual plant use sites. A,Prinsepia utilis branch stuck into the water drain of a house to ward off ghosts (indicated by arrow; by Staub 2010). B, Incense and Populus sp. branch are placed in a holder at one side of the entrance of a house (by Hess 2010). C, A grass species was planted on top of a grave to support the prosperous development of the family (by Hess 2010).
