| Author | L. | |
| Distribution | Scattered across the state, with a concentration in the Northeast.
Native of Europe; in N.A. widespread in the East. | |
| Abundance | Rare to uncommon throughout, but with gaps; perhaps frequent in the northeastern Coastal Plain. | |
| Habitat | Perennially wet marshes, river backup channels, montane seepage bogs, meadows, etc. Most numerous in NC in tidal freshwater marshes around Albemarle and Currituck sounds and tributaries. | |
| Phenology | Flowering and fruiting May-June. However, in NC, most populations seem to be sterile and do not flower/fruit. | |
| Identification | The leaves are 2-4 feet tall and closely resemble those of Iris. The inflorescence is at the base of the plant, a thick, dense spike of florets, pale straw-color and blunt-tipped. However, in NC, inflorescences are seldom seen. The native A. americanus does not reach farther south than NJ and OH. | |
| Taxonomic Comments | | |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | G4? | |
| State Status | | |
| US Status | | |
| USACE-agcp | OBL link |
| USACE-emp | OBL link |
