UW Burke Herbarium species comparison

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Grindelia squarrosa

curlycup gumweed, serrate resinweed
Habit Glabrous biennial or short-lived perennial, 1-10 dm. tall.
Leaves

Leaves usually with fine to coarse, thickened teeth; the lower leaves oblanceolate, up to 15 cm. long and 3 cm. wide, the middle and upper leaves somewhat reduced and clasping the stem.
Flowers

Heads several, the disk 1-2 cm. wide;

rays 25-40, pistillate and fertile, yellow, 7-15 mm. long;

involucre strongly resinous, imbricate, the green tips of the bracts reflexed;

pappus of 2 or more deciduous awns.
Fruits

Achenes truncate at the apex.

Grindelia squarrosa
Flowering time June-September
Habitat Dry, open, often sandy places, at low to middle elevations, often where disturbed.
Distribution
Occurring east of the Cascades crest in Washington; British Columbia to California, east across southern Canada and most of the United States to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Conservation status Not of concern
Sibling taxa
G. hirsutula, G. integrifolia
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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