gumweed

Definitions of gumweed

1. noun

   any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock
   synonyms: gum plant, rosinweed, tarweed

   types:

   Grindelia robusta

   perennial gumweed of California and Baja California

   Grindelia squarrosa, curlycup gumweed

   perennial gumweed of western and central North America

   type of:

   herb, herbaceous plant

   a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests