On May 25, 2008, LindaTX8 from NE Medina Co., TX (Zone 8a) wrote:
Rapistrum rugosum has become an invasive introduced weed in many areas of the U.S. It is difficult to control and has resistance to some kinds of herbicide. It can successfully outcompete native plant species in natural areas such as open forests and along streams. It also establishes easily on agricultural fields, roadsides and disturbed lands.
This plant has been said to grow in the following regions: