Deparia petersenii

Deparia petersenii, commonly known as the Japanese lady fern, is a species of fern that generally grows between 12 and 24 inches (300 and 610 mm) in length and has a width of between 12 and 18 inches (300 and 460 mm). This fern does not have any flowers and can be easily identifiable having gray hairs that grow on the underside of the leaves.[1] This perrenial fern is an aggressive fast growing invasive species known for long rhizomes and ability to form a thick ground cover. D. petersenii is sometimes cultivated and can be purchased online because it is not regulated or prohibited.[2]

This species in native to some of China, Indonesia to Taiwan, Japan to Australia and New Zealand, and Polynesia. This species can be found in Louisiana, Mississippi, Florida, Arkansas, Georgia, and Hawaii with less than fifty sightings between the six states according to the Invasive Plant Atlas of the United States.[3] D. petersenii can be considered an invasive species in Madeira, the Azores, southeastern USA, the Hawaiian Islands, southeastern Brazil and Réunion.[2]

• http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=v540
• https://www.invasiveplantatlas.org/subject.html?sub=5530
• https://www.cabi.org/isc/datasheet/113835#tosummaryOfInvasiveness