What is of, pertaining to, or resembling, a natural order of plants (Papaveraceæ) of which the poppy, the celandine, and the bloodroot are well-known examples called?

papaveraceous — Of, pertaining to, or resembling, a natural order of plants (Papaveraceæ) of which the poppy, the celandine, and the bloodroot are well-known examples. (Webster's 1913.)

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