Ptilimnium
Ptilimnium is a group of plants in the family Apiaceae described as a genus in 1819. The common name is mock bishopweed or mock bishop's weed. It is endemic to the United States, primarily in the Southeast, the Lower Mississippi Valley, and the Lower Great Plains.
;Accepted species
- Ptilimnium capillaceum Raf. - SE + SC + NE USA
- Ptilimnium costatum Raf. - SC USA
- Ptilimnium fluviatile Mathias - SE USA
- Ptilimnium nodosum Mathias - Georgia, South Carolina
- Ptilimnium nuttallii Britton - SC USA
- Ptilimnium texense J.M. Coult. & Rose - Texas, Louisiana, Florida
- Ptilimnium viviparum Mathias - Virginia, West Virginia, Maryland