Source : WordNet®

prairie berry
     n : weedy nightshade with silvery foliage and violet or blue or
         white flowers; roundish berry widely used to curdle milk;
         central United States to South America [syn: {trompillo},
          {white horse nettle}, {purple nightshade}, {silverleaf
         nightshade}, {silver-leaved nightshade}, {silver-leaved
         nettle}, {Solanum elaeagnifolium}]