Lysimachia foemina (commonly known as Poorman's Weatherglass and formerly known as Anagallis foemina) is a low-growing annual herbaceous plant of the genus Lysimachia belonging to the Primulaceae family. In a comparison of DNA sequences, L. foemina was shown to be most closely related to L. monelli. It had been thought by many to be closest to L. arvensis, and some authors had even included L. foemina as a subspecies of L. arvensis. The three species were among several transferred from Anagallis to Lysimachia in a 2009 paper.