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Which family of parasitic plants was found to be closely related to Euphorbiaceae?
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Malpighiales
Weeping willow (Salix babylonica).
Within the order Malpighiales, the family of parasitic plants found to be closely related to the core Euphorbiaceae is Rafflesiaceae.1
Molecular studies have shown that Rafflesiaceae, which lacks chlorophyll and is parasitic on other flowering plants, is closely related to the core Euphorbiaceae. This discovery also led to the recognition of the family Peraceae as a distinct group, as it serves as the sister group to the combined lineage of Rafflesiaceae and Euphorbiaceae.1