Plants of the San Marcos Foothills Preserve

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Brassica nigra (Black Mustard)

Common, non-native annual herb found throughout the Preserve in scattered locations but also in large stands, particularly east of the Cieneguitas Creek watershed. Flower are yellow. Blooms in spring.

Brassica nigra (black mustard) seedling. NON-NATIVE. Pictured in Winter.

Brassica nigra (black mustard). NON-NATIVE. Developing seedlings. Pictured in winter.

Brassica nigra (black mustard). NON-NATIVE. Developing seedlings. Note dead stocks from previous year. Pictured in winter

Brassica nigra (black mustard). NON-NATIVE. Pictured in spring.

Brassica nigra (black mustard). NON-NATIVE. Full bloom. Pictured in spring..

Brassica nigra (black mustard). NON-NATIVE. Pictured in winter.

Brassica nigra (black mustard). NON-NATIVE. Close up of leaf. Pictured in winter.

Brassica nigra (black mustard). NON-NATIVE. Pictured in Fall.

Brassica nigra (black mustard). NON-NATIVE. Close up of fruit. Pictured in Fall.