gumweed definition

  • noun:
    • any one of numerous Western United states plants associated with genus Grindelia having resinous leaves and stems formerly used medicinally; usually poisonous to livestock.
    • The gum-plant. Grindelia (which see; also Grindelia).
    • A weed of Great Plains, Lygodesmia juncea, associated with the Cichoriace√¶. It is a rigid, branching, skeleton-like plant with most of the leaves very small or paid down to machines.
    • any of different western US plants for the genus Grindelia having resinous leaves and stems formerly used medicinally; frequently toxic to livestock

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