| Author | (L.) Roth | |
| Distribution | There are 2 specimens at SERNEC from Harnett County, but both are I. hederacea. Weakley (2024) shows it as not established in NC, with an asterisk only. However, there are a number of Research Grade photos now on iNaturalist, and thus it does have a place now on the NC flora list.
Native to Tropical America. | |
| Abundance | Very rare now, essentially in the Piedmont so far. | |
| Habitat | Disturbed places. | |
| Phenology | "Dec-Jul (-Nov)" (Weakley 2024). | |
| Identification | This species is very similar to the perhaps native I. hederacea, with light to medium blue flowers. Weakley's (2024) key separates these by I. nil having "Sepals ca. 3 cm long at anthesis, gradually narrowed upwards, the long acute tips suberect, straight, scarcely spreading; corolla 4-4.5 cm long; peduncles long or short" whereas I. hederacea has "Sepals < 2 cm long at anthesis, abruptly narrowed upwards, the long subacute tips strongly spreading or recurved outwards; corolla < 3.5 cm long; peduncles very short". Thus, Ipomoea nil has larger flowers and different sepals than does I. hederacea. | |
| Taxonomic Comments | | |
| Other Common Name(s) | Japanese Morning-glory | |
| State Rank | SE | |
| Global Rank | GU | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
