| Author | (Loureiro) W.D. Clayton | |
| Distribution | So far documented from Robeson County only: soybean field, 1.7 miles NW of Rowland, 5 Nov. 1984 (D.T. Patterson s.n. (DUKE). Other collections from the same site later in the same month.
Native of southeastern Asia; in N.A. mostly in the Gulf Coast states; scattered elsewhere. | |
| Abundance | Very rare, so far as is known. Other populations may not have been documented with herbarium specimens. | |
| Habitat | Soybean and other crop fields. This is a Federal noxious weed, and Soil Conservation Service agents monitor it. | |
| Phenology | Flowering and fruiting August-November. | |
| Identification | Itch-grass may grow 2-5 or more feet tall and so stands above crops. The stems produce distinctive prop-roots from the lower nodes. The inflorescences are axillary and terminal, and look like narrow stacks of little cylinders one atop another. | |
| Taxonomic Comments | | |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | FACU link |
| USACE-emp | FACU link |
