species of plant
Brasica nigra, also known as black mustard, is an annual plant grown for its seeds, which is commonly used as a spice. It is native to the tropics of North Africa and temperate regions of Europe and parts of Asia.  
|Wikimedia Commons has media related to Brassica nigra.|
- "Brassica nigra (L.) K.Koch — The Plant List". www.theplantlist.org. Retrieved 2019-08-08.
- "This super bloom is pretty dangerous: Invasive mustard is fuel for the next fire". Los Angeles Times. 2019-04-25. Retrieved 2019-08-08.