Brassica tournefortii (weed)
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Author(s): Joseph M. DiTomaso, University of California - Davis
Source: IPM Images
Brassica tournefortii (weed) Gouan - (African mustard)
This plant is native to the Mediterranean region, the Near East and parts of western Asia. It is introduced and invasive in semi-arid parts of Australia, South Africa, and south-western North America. Dense populations develop in wet years with early rain fall, when its supresses native species. In addition, it is an agricultural weed in crops like cotton.
In North America, B. tournefortii was first collected in 1927 in California. Initially confined to parts of that state, its distribution increased rapidly in the 1980s, and it covers now around 500,000 km2 of south-western U.S. and Mexico (Winkler et al., 2019).
| Vernacular names | |
|---|---|
| • English: | African mustard Sahara mustard |
| • Français: | chou de Tournefort |
The plant grows to a height of around ½ m and produces many seeds soon after germination. The seeds are protected from desiccation by a special coating which becomes sticky when moistened and promotes their spread by humans, animals and vehicles.
- Other images of Brassica tournefortii (weed) (Wikimedia Commons and IPM Images - click to enlarge)
foliage
fruit
