Photo: Grindelia squarrosa.

Flowering plant. Boardman, OR, US. Wild. 1996-07-17.
Grindelia squarrosa (Pursh) Dunal Engl.: curlycup gumweed, ague weed, scaly grindelia. Deu.: Sperriges Gummikraut, Harzkraut. Bot. syn.: Grindelia perennis A. Nels., Grindelia serrulata Rydb.
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Photo: Grindelia squarrosa.