Any of several plants of the southern U.S. constituting the genus Callirhoe (family Malvaceae), having showy flowers, often red or purple, resembling those of the poppy.
Origin
Mid 19th century; earliest use found in Alphonso Wood (1810–1881), botanist.
Definition of poppy mallow in US English:
poppy mallow
noun
Any of several plants of the southern U.S. constituting the genus Callirhoe (family Malvaceae), having showy flowers, often red or purple, resembling those of the poppy.
Origin
Mid 19th century; earliest use found in Alphonso Wood (1810–1881), botanist.