(A) Common Mustard (Brassica nigra ) (European) 
is extensively cultivated in Europe for the small dark 
brown seeds that form a valuable article of commerce, 
being used for the table condiment and for various 
medicinal purposes. 
In our country, Mustard is regarded as a pest; it is 
a very strong, hardy plant, soon overrunning sections 
where it gets a foothold. The stem is very branching 
and grows to heights of from 2 to 7 feet. The four- 
petalled, light yellow flowers are in small dense clusters 
at the ends of the branches; a trail of small, erect seed- 
pods is left in the wake of the flowers as they continue 
to bloom along the lengthening stem. The leaves have a 
large terminal, notched lobe and smaller lateral ones. 
» * m 
. (B) Hedge Mustard {Sisymbrium officinale ) (Euro¬ 
pean,).. This common weed has tiny, four-petalled yel¬ 
low flowers that bloom all summer, along the lengthen¬ 
ing stem, and leave numerous tiny pods closely set 
against, the stem. The leaves are more angular and 
more finely divided than those of the Common Mustard. 
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