rosinweed
(räz′ən wēd′)☆
noun
- any of a genus (Silphium) of North American plants of the composite family that have resinous juice, sticky foliage, and strong odors, including the compass plant
- any of several similar resinous plants
See rosinweed in American Heritage Dictionary 4
noun Any of several North American plants of the genera Grindelia or Silphium, especially the compass plant, the cup plant, and the gum plant, having a resinous juice.