sil·ver·weed /-ˌwid/
  鶴金梅的一種
  Sil·ver·weed n. Bot. A perennial rosaceous herb (Potentilla Anserina) having the leaves silvery white beneath.
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  silverweed
       n 1: any of various twining shrubs of the genus Argyreia having
            silvery leaves and showy purple flowers
       2: low-growing perennial having leaves silvery beneath;
          northern United States; Europe; Asia [syn: goose-tansy,
          goose grass, Potentilla anserina]