| Special Geographical Unit: | St. Marks Nat'l Wildlife Refuge (Wakulla Unit) |
| Verbatim Directions to Locality: | St. Marks Nat'l Wildlife Refuge (Wakulla Unit); beside Rd 204 at junction with Rd 202, E of Wakulla Beach Rd. |
| Habitat: | In ditch with Cladium. |
| Plant Morphology Observations: | Plants to 18 dm tall. |
| Local Abundance Observations: | Frequent. |