curly-cup gumweed

(Grindelia squarrosa)

curly-cup gumweed

Curly-cup gumweed is a species of flowering plant in the family Asteraceae. It is native to western North America, from British Columbia to California and eastward to Montana and New Mexico. It is found in open areas, including meadows, prairies, roadsides and sometimes in disturbed areas, including abandoned fields, clearcuts, and burned areas. It grows under full sun or partial shade in well-drained sandy, rocky, and clay soils.


Curly-cup gumweed contains terpenes and flavonoids, which are believed to have anti-inflammatory and antimicrobial properties. It has been used by Native American tribes as a natural remedy for respiratory infections, skin irritations, and headaches. It is also used in modern herbal medicine in teas, tinctures, and capsules, to treat coughs, bronchitis, and other respiratory conditions.


Grindelia squarrosa is a perennial herbaceous plant that grows to a height of 30 to 90 cm. The plant has a woody stem at its base and is often branched above. The leaves are narrow and alternate, with toothed margins, and are covered with a sticky resin. They are up to 10 cm long and 1 cm wide.

The flower heads of Grindelia squarrosa are yellow and daisy-like, and they are surrounded by numerous narrow, pointed bracts that are arranged in several overlapping layers. The flower heads are 2 to 5 cm in diameter and contain both ray and disc flowers. The ray flowers are yellow and strap-shaped, while the disc flowers are yellow and tubular.

The fruit of Grindelia squarrosa is an achene, which is a dry, one-seeded fruit that does not open at maturity. The achenes are about 3 mm long, flattened, and have a tuft of white hairs at the tip that aid in wind dispersal.


Distribution Map



2, 3, 4, 5, 7, 28, 29, 30.

  Kingdom Plantae (green algae and land plants)  
  Subkingdom Viridiplantae (green plants)  
  Infrakingdom Streptophyta (land plants and green algae)  
  Superdivision Embryophyta (land plants)  
  Division Tracheophyta (vascular plants)  
  Subdivision Spermatophytina (seed plants)  
  Class Magnoliopsida (flowering plants)  
  Superorder Asteranae  


Asterales (sunflowers, bellflowers, fanflowers, and allies)  


Asteraceae (sunflowers, daisies, asters, and allies)  
  Subfamily Asteroideae  
  Supertribe Asterodae  
  Tribe Astereae (asters and allies)  
  Subtribe Machaerantherinae  
  Genus Grindelia (gumplants)  

Subordinate Taxa


prairie gumweed (Grindelia squarrosa var. serrulata)

broadleaf gumweed (Grindelia squarrosa var. squarrosa)

curly-cup gumweed (Grindelia squarrosa var. quasiperennis)




Aurelia amplexicaulis

Aurelia squarrosa

Donia squarrosa

Grindelia aphanactis

Grindelia arguta

Grindelia nuda

Grindelia pinnatifida

Grindelia serrulata


Common Names


curly-cup gumweed

curlycup gumweed

curlytop gumweed















Visitor Photos

Share your photo of this plant.

  This button not working for you?
Simply email us at
Attach one or more photos and, if you like, a caption.






    curly-cup gumweed   curly-cup gumweed  
    curly-cup gumweed      


    curly-cup gumweed      

Flower Head

    curly-cup gumweed   curly-cup gumweed  
    curly-cup gumweed      


    curly-cup gumweed      






Visitor Videos

Share your video of this plant.

  This button not working for you?
Simply email us at
Attach a video, a YouTube link, or a cloud storage link.


Other Videos
  Gumweed / Grindelia squarrosa

Published on Jan 13, 2013

No description available.


Uploaded on Sep 10, 2011

Had nothing better to post.




Last Updated:

About Us | Privacy Policy | Contact Us | © All rights reserved.