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The Collaborative International Dictionary
Alum root

Alum root \Al"um root`\ (Bot.) A North American herb ( Heuchera Americana) of the Saxifrage family, whose root has astringent properties.

Wikipedia
Alum root

Alum root or Alumroot is a common name for some species of two different groups of plants:

  • Heuchera - also called coralbells.
  • Geranium - also called wild geranium or cranesbills.