| Author | Lamarck | |
| Distribution | Southern 60% of the Coastal Plain and Sandhills, though should occur in the northern part of the province, as it is found in all southeastern counties in VA. The only Outer Banks record is from Wanchese on Roanoke Island.
Mostly Coastal Plain, N.S. to southern FL and eastern TX; central TN; Cuba, C.A. | |
| Abundance | Frequent to common; probably present but very rare and overlooked in the northern Coastal Plain. | |
| Habitat | Depression ponds, cypress-gum ponds, clay-based Carolina bays, margins of blackwater streams, beaver ponds, impoundments, ecotones between savannas and pocosins, ditches. | |
| Phenology | Flowering and fruiting June-October. | |
| Identification | Combleaf Mermaid-weed grows like Marsh Mermaid-weed (P. palustris), sprawling and sending up flowering shoots of tiny flowers and greenish white capsules. It differs in having all leaves finely dissected, not just the lower ones. In fact, the emergent leaves do look quite a bit like a comb, hence the common name. Both species are reasonably common over much to most of the Coastal Plain, with many bodies of still water of pools and ponds containing at least one of these species. | |
| Taxonomic Comments | NC plants are rarely confused with mature P. palustris; any "intermediates" may or may not represent hybrids.
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| Other Common Name(s) | None | |
| State Rank | S4 | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | OBL link |
| USACE-emp | OBL link |
