Grindelia squarrosa var. squarrosa

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Scientific Name Grindelia squarrosan var. squarrosa USDA PLANTS Symbol GRSQ
Common Name Curlycup Gumweed ITIS Taxonomic Serial No. 37472
Family Asteraceae (Sunflower) SEINet
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Description Life zones and habitat: Plains and foothills (3500 to 8500 ft.); Dry soils in open areas, roadsides, disturbed sites.
Plant: Perennial or biennial, 4 to 40 inches tall; stems erect or occasionally lying on the ground; usually whitish-green, sometimes reddish or grayish, and smooth.
Leaves: Alternate, oblong to oblanceolate, glandular surfaces, 5/8 to 2-3/4 inches long with crenulate-serrate. with short teeth.
Inflorescence: Composite flower heads in clusters, 1 to 2+ inches across with 25 to 40 yellow rays surrounding the center of 25 to 40 yellow disk florets; phyllaries in 5-6 series, recurved to appressed, fleshy.
Bloom Period: June to October.
References: "Flora of Colorado" by Jennifer Ackerfield and SEINet.
BONAP Distribution Map
Colorado Status:

© Tom Lebsack 2021