Xanthorhiza Marshall. Subfamily: Coptidoideae. Yellowroot.
A monotypic genus, a shrub, of temperate e. North America.
ID notes:An unmistakable plant, the woody stems usually about knee-high and unbranched, bearing a cluster of pinnate leaves near the tip, and the rhizomes with the bright yellow, staining, bitter-tasting alkaloid berberine.
Ref: Parfitt (1997e) In Flora of North America Editorial Committee (1997); Tamura In Kubitzki, Rohwer, & Bittrich (1993). Show full citations.
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