This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
Family, Mustard. Color, yellowish. Plant 1 to 4 feet high. Leaves, alternate, pinnately cleft or parted, the upper slashed or cut into very fine pieces, the lower divided or cleft, very pungent to the taste. Pods, short, curved, on stalks of the same length. May to August.
In wet places or often found growing in shallow water.
 
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