Black Mustard (Brassica nigra)
| Plants with yellow flowers | |
|---|---|
| Evening Primrose | Common Rock-rose |
| Hoary Rock-rose | Golden Samphire |
| Yellow Horned Poppy | Field Fleawort |
| Silver Ragwort | Sea purslane |
| Wild Cabbage | Black Mustard |
| Bird's Foot Trefoil | Sea Wormwood |
| Yellow Stonecrop | |
| Plants with blue or purple flowers | |
|---|---|
| Common Sea Lavender | Rock Sea Lavender |
| Vernal Squill | Sea Holly |
| Sheep's Bit | Dune Pansy |
| Plants with green or brown flowers | |
|---|---|
| Sea Beet | Sea Spurge |
| Alexanders | Sea Plantain |
| Grasses | |
|---|---|
| Marram Grass | Lyme Grass |
| Cord Grass | Sea Couch Grass |
| Trees & Shrubs | |
|---|---|
| Sea Buckthorn | Creeping Willow |
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Black Mustard is a common plant of sand dunes and sea cliffs, seen in flower from May until September. Its 4-petalled flowers are usually pale yellow in colour but can be white. The plant is typically 3 to 5 feet in height. Differing from similar species in having stalked leaves; the upper leaves are lanceolate, the lower bristly.