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Stipules linear, downy, membranous at first, ultimately developing into hard woody prickles, straight or slightly curved. Each leaflet has a minute stipel which quickly falls and a short petiole.
Flowers: May, after the leaves. Papilionaceous.
It is filled with crunchy seeds each of which is encased in a juicy, somewhat acidic pulp that is itself enclosed in a membranous skin. The seeds, juice and pulp are eaten, but the yellowish membrane is fiberous and bitter to taste.
  
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