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Plant IdentificationCommon name: dirty dora, rice sedge, variable flatsedgeBotanical Name: Cyperus difformisFamily name: CyperaceaeLocation: Windsor, NSWDate: 11th April 2009Collector: John PoulakisHabitat: A native of Asia this annual plant is widespread throughout Australia and most common in the southern irrigation areas. May grow and flower year round and is present through much of the cotton growing areas. A prolific seed producer.Economic significance: Is a major weed in rice production and categorised as a pest in irrigation structures.