closeup of flowers

sometimes looks thin







Inflorescence - Terminal racemes elongating in fruit to +60cm. Pedicels 2-4mm long in flower, to 1.3cm long in fruit, glabrous.

Flowers - Petals 4, yellow, clawed, glabrous. Claw to 3mm long. Limb 3-4mm long, +3mm broad. Stamens 6, erect. Filaments greenish-yellow, to -4mm long, glabrous. Anthers yellow, to 1.5mm long. Ovary green, terete, 3mm long, glabrous. Style 1.3mm long, persistent in fruit. Sepals 4, greenish-yellow, -4mm long, 1mm broad, linear, erect to spreading, glabrous, margins often revolute. Siliques to +4.5cm long, terete to 4-angled, with beak to +/-8mm long, glabrous ascending and usually parallel to stem axis. Seeds +20 per fruit, brownish-black.

Flowering - April - November.

Habitat - Fields, waste ground, roadsides, also cultivated.

Origin - Native to Eurasia.

Other info. - The plant can be identified in the field by the massive number of erect fruits it produces, its deep green leaves, and its small yellow flowers. The stems are long and thin. The plant often falls over when it reaches maturity because of the large number of fruits produced.
B. nigra plant is often grown for its small greens and for its seeds, which are used to make mustard.