nine-bark definition

  • noun:
    • A white-flowered rosaceous shrub (Neillia opulifolia, or Spiræa opulifolia), common in the Northern United States. The bark separates into many thin layers, whence the name.
    • An American shrub, Neillia (Spiræa) opulifolia, sometimes planted. It is so named on account of the numerous layers of the loose bark. See cut under Neillia.

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