African mustard

Brassica tournefortii Gouan

Description from Invasive.org

Appearance: Brassica tournefortii is an annual herb that can grow to 3 ft. (0.9 m) tall which usually grows in areas such as desert lands and dunes.
Foliage: The leaves are mainly in a basal rosette and are green, pinnately lobed, and have toothed margins which are prickly hairy.
Flowers: The flowers have 4 light yellow petals, are 0.25 in. (0.6 cm) across, and are clustered in groups of 6 to 20 flowers. The blooming period occurs from February to April.
Fruit: Fruit is 2.5 in. (6.35 cm) long, linear, with rounded edges and an obvious beak at the tip. Seeds are round, dark brown to brown-purple, and are sticky when wet.
Ecological Threat: Brassica tournefortii prefers disturbed areas such as roadsides and abandoned fields. It is native to Africa, Asia, and Europe.

Selected Images from Invasive.org

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Plant(s)
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
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Foliage
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Foliage
Bonnie Million, Bureau of Land Management, Bugwood.org
Additional Resolutions & Image Usage

Feature(s) downward turning hairs at base of the stem
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s)
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Stem(s)
Bonnie Million, Bureau of Land Management, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s)
Bonnie Million, Bureau of Land Management, Bugwood.org
Additional Resolutions & Image Usage

Flower(s) inflorescence
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Damage Aphids on Brassica tournefortii
Bonnie Million, Bureau of Land Management, Bugwood.org
Additional Resolutions & Image Usage