
https://m.farms.com/ag-industry-news/understanding-winter-canola-in-ont-401.aspx
Upright winter annual broadleaf that grows 3-5 feet tall. Has narrow leaves, yellow flowers, a strong taproot, and fibrous lateral roots.
For more region specific information, each cover crop species can be found in the cover crop decision tool by name.
Brassicas & mustards overview: Managing Cover Crops Profitably (SARE Handbook Series Book 9) by Andy Clark (2007, 3rd ed.)