| Author | Gaertner, Meyer, & Scherbius | |
| Distribution | Vouchered from four counties in the Mountains.
Native of Eurasia; in N.A. -- N.S. to B.C. south to NC, TN, and AZ. | |
| Abundance | Very rare. | |
| Habitat | Edge of stream, roadside, meadow, garden weed in seepage area. | |
| Phenology | Flowering and fruiting April-July. | |
| Identification | Horseradish has 2 types of leaves: basal ones from very long stalks, with large blades broadly elliptical or obovate; and stem leaves that are smaller, lance-shaped, and varying from pinnately cut to merely toothed. The plants grow 1.5-3 feet tall, with a terminal cluster of numerous medium-sized white flowers, typical of those of mustards. | |
| Taxonomic Comments | | |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
