Asteraceae are important in herbal medicine, including "Grindelia", yarrow, and many others. The larvae feed on "Grindelia" and "Haplopappus". The larvae feed on "Aster", "Grindelia" and "Helianthus" species. "Grindelia microcephala" grows in rich bottom lands along streams. "Grindelia squarrosa" produces numerous flower heads in open, branching arrays. "Grindelia adenodonta" grows in prairies and thickets, and along streambanks. Grindelia greenmanii is a North American species of flowering plants in the daisy family. "Grindelia squarrosa" is often found in disturbed roadsides, streamsides; in elevation. Grindelia adenodonta, Lonestar gumweed, is a species of flowering plants in the daisy family. "Grindelia hirsutula" is native to North America, widespread across Canada and in California and Oregon.