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Photographer: Merel R. Black
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Family Brassicaceae
Sinapis arvensis L.
California rape, charlock mustard
Sinapis: Greek, said to come from the Celtic for "turnip"
arvensis: of planted fields
Hazardous 
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| Status: | Introduced - naturalized |
| Plant: | annual, 4"-32" tall forb, usually with some rough hairs |
| Flower: | yellow, 4-parted, 1/2" wide; inflorescence a cluster (raceme) of stalked flowers; blooms May-July |
| Fruit: | long, thin, flat, erect, 4 -sided pods, the pointed tip often half as long as the body |
| Leaf: | oblong, lower leaves coarsely toothed to lobed |
| Habitat: | disturbed areas |
| (Glossary) |
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