Source : WordNet®

pin clover
     n : European weed naturalized in southwestern United States and
         Mexico having reddish decumbent stems with small fernlike
         leaves and small deep reddish-lavender flowers followed
         by slender fruits that stick straight up; often grown for
         forage [syn: {redstem storksbill}, {alfilaria}, {alfileria},
          {filaree}, {filaria}, {clocks}, {pin grass}, {Erodium
         cicutarium}]