| Verbatim Directions to Locality: | ca. 6 air mi N of Apalachicola |
| Township: | 7S |
| Range: | 7W |
| Section: | 31 |
| Quarter: | SW |
| Habitat: | Gardner Landing on the East River |
| Plant Morphology Observations: | Perianth white as in P. setaceum, but leaves and stripular sheath trichomes as in P. hydropiperoides |
| Non digital information?: | N |