Brassica nigra
PlantsFamily: Brassicaceae · Genus: Brassica

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About
Rhamphospermum nigrum, black mustard, is an annual plant native to cooler regions of North Africa, temperate regions of Europe, and parts of Asia. It is cultivated for its dark-brown-to-black seeds, which are commonly used as a spice.
Summary from Wikipedia
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Growing details and traits for Brassica nigra in the Library.
No cultivars in the Library yet — the full profile above covers the species itself.