| Special Geographical Unit: | Apalachicola National Estuarine Sanctuary |
| Verbatim Directions to Locality: | ST. VINCENT ISLAND, National Wildlife Refuge. In small marsh just W of Road 4 and 0.2 mi N of Road B. |
| Habitat: | With R. tracyi and Eleocharis equisetoides in small marsh. |
| Local Abundance Observations: | Frequent. All similar marshes on island have R. corniculata in them! |
| Non digital information?: | N |