Gumweed
Grindelia squarrosa (Pursh) Dunal.
Other common names: curly cup, rosinweed, sticky heads, tar weed
Grindelia: in honor of David Hieronymus Grindel, a Russian botanist at the beginning of the 19th century
Squarrosa: from the botanical term squarrose, meaning “having stiff spreading bracts,” in reference to the many bracts surrounding the base of each flower
Daisy family: Asteraceae (Compositae)
Photograph by Thomas Rosburg, Wildflowers of the Tallgrass Prairie: The Upper Midwest, Second Edition
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