酸模叶蓼（学名：Polygonum lapathifolium），又称旱辣蓼、早苗蓼、白蓼、麦蓼，是一种蓼科蓼属植物。这种植物分布于中国南北各省区；欧亚大陆温带地区均有。

Persicaria lapathifolia (syn. Polygonum lapathifolium), known as pale persicaria, is a plant of the family Polygonaceae. It is closely related to Redshank and as such is considered a weed in Britain and Europe. Other common names for the plant include pale smartweed, curlytop knotweed, and willow weed. It is a species complex made up of a great many varying forms, sometimes considered varieties. The environment also has a strong influence on the morphology of an individual plant.