Brassica nigra

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Taxonomy
Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Order: Capparales
Family: Brassicaceae
Genus: Brassica
Species: nigra
Scientific Name
Brassica nigra
(L.) W.D.J. Koch
Common Names

black mustard, shortpod mustard

Overview

Appearance
Brassica nigra is an annual plant that can grow 2-8 ft. (0.6-2.5 m) tall, branching occasionally.
Foliage
The leaves are alternate up to 10 in. (25 cm) long and 3 in. (7.6 cm) across, becoming smaller as they ascend the stems. The lower leaves are pinnate and obovate. The upper surface of a lower leaf is often has scattered hairs that are stiff, short, and white.
Flowers
Flowers are in clusters that are 0.5-2 ft. (0.15-0.61 m) long when fully mature. Each flower can be 0.3 in. (7.6 mm) across, consisting of 4 yellow petals. The petals are rounded toward their tips. Flowers are in bloom during the summer.
Fruit
Fruit is about 0.67 in. (17 mm) long and tapering to a conical beak. The seeds are dark brown to black in color with a pungent taste.
Ecological Threat
Brassica nigra prefers disturbed areas including meadows, thickets, areas along railroads and roadsides. It is native to Eurasia.

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