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sourgrass
noun the yellow-flowered herb, oxalis. Compare soursob.
Contributor's comments: Sour sob is the term for this weed in SA.
Contributor's comments: I'm sure we called oxalis sourgrass as children growing up in the south-west of WA. But I think we also called it 'soursobs' or maybe it was 'soursops'.
Contributor's comments: In the Riverina, children would pick and eat sourgrass on the way to and from school. The trick was to find a plant certain to be unsoiled by dogs.