| Author | (Houttuyn) de Candolle | |
| Distribution | Only one specimen is correctly identified: Watauga County, Appalachian State Univ., Environmental Studies Area, 25 July 1999, Moore 39 (BOON); annotated by M. Denslow in 2013. Other specimens at SERNEC are actually S. arvensis.
Native of Eurasia; in N.A. MA to Ont. south to NC, MO, and TX. Also WA to CA. | |
| Abundance | Very rare. | |
| Habitat | Not stated; apparently a campus weed. | |
| Phenology | Flowering and fruiting June-July. | |
| Identification | Members of Torilis all have hooked prickles on the fruits. In T. arvensis and T. japonica, the umbel rays are well-developed (vs. poorly developed and giving the umbel a compact, head-like look in T. nodosa). T. japonica differs from T. arvensis mainly by possessing more than 2 involucral bracts (vs. none or one), broader ultimate leaf segments, and smaller fruits. | |
| Taxonomic Comments | This species has in the past been confused with T. arvensis.
| |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
