What is any plant of the umbelliferous genus Laserpitium, of several species (as L. glabrum, and L. siler), the root of which yields a resinous substance of a bitter taste. The genus is mostly European called?

laserwort — Any plant of the umbelliferous genus Laserpitium, of several species (as L. glabrum, and L. siler), the root of which yields a resinous substance of a bitter taste. The genus is mostly European. (Webster's 1913.)

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