Answer: alumroot

AnswerCrossword Clue
ALUMROOTPlant used as an astringent
ALUMROOTNA perennial
alumrootany of several North American plants belonging to the genus Heuchera, of the saxifrage family, esp. H. americana, having mottled foliage and greenish-white flowers
alumrootthe root of any of these plants, used as an astringent