Maydowwort or Meadowwort: How To spell?

The word Maydowwort is misspelled against Meadowwort, a noun meaning "The name of several plants of the genus Spiraea, especially the white- or pink-flowered S. salicifolia, a low European and American shrub, and the herbaceous S. Ulmaria, which has fragrant white flowers in compound cymes."