Isocoma drummondii
Isocoma drummondii, the Drummond's goldenbush or Drummond's jimmyweed, is a North American plant species in the family Asteraceae. It has been found on both sides of the Río Grande, in Tamaulipas and in southern Texas.
Isocoma drummondii is a completely hairless shrub up to 100 cm tall. The plant produces flower heads in clusters on the tips of branches, each head containing 22–34 disc flowers but no ray flowers.