Washington Flora Checklist

A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium, Burke Museum

Checklist » Asteraceae » Grindelia squarrosa

Last updated 10/30/2021 by David Giblin.

Grindelia squarrosa (Pursh) Dunal[FNA20, HC, HC2]

curlycup gumweed, serrate resinweed

Publication: Mém. Mus. Hist. Nat. 5: 50. 1819.

Origin: Native

selected vouchers: WTU

Notes: Oregon Flora Project: "Although G. squarrosa is similar to G. nana in the form of its inflorescence and can sometimes be difficult to distinguish, the two species are rather distantly related and are unlikely to hybridize. Grindelia squarrosa appears to be increasing throughout its range and taking over areas that were occupied until recently by G. nana (and other species in other states)."

References: (none)

Infraspecies:

var. serrulata (Rydb.) Steyerm. [OFP]

curlycup gumweed, serrate resinweed

Synonyms & Misapplied Names:

Grindelia squarrosa (Pursh) Dunal var. squarrosa[HC]