| Special Geographical Unit: | Apalachicola National Estuarine Sanctuary |
| Verbatim Directions to Locality: | Apalachicola National Estuarine Sanctuary; at Bloody Bluff, 2.4 mi W of rte 65, ca. 10 air mi N of town of Apalachicola. |
| Habitat: | on wooded floodplain of Apalachicola River at Bloody Bluff. |
| Plant Morphology Observations: | Atypical-cespitose and achenes longer than wide, but spikes are remote as in C. louisianica also a late season bloomer. |
| Non digital information?: | N |