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Pua kala, pkalakala, or Hawaiian prickly poppyPapaveraceaeEndemic to the Hawaiian IslandsLocally common to uncommonOahu (Cultivated), seed podEven with the toxic background, the early Hawaiians used the bright yellow sap (latex) and seeds medicinally for toothache pain, neuralgia (nerve pain), and ulcers. The sap only was used for warts.EtymologyThe genus name Argemone is derived from the Greek argema, cataract, in reference to the use of the sap of type of poppy reputed to cure cataracts.The specific epithet glauca is from the Greek, glaukos, for blue-green or blue-gray referring to the color of this poppy's leaves.nativeplants.hawaii.edu/plant/view/Argemone_glauca