• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Grindelia squarrosa

Grindelia squarrosa - Curlycup Gumweed

Grindelia squarrosa - Curlycup Gumweed

NPS Photo

Species: Grindelia squarrosa
Common name: curlycup gumweed

Seedling identification: Very similar to the Solidago genus; however, Grindelia seedlings are much more "toothy" and have glands at the base of the teeth. Leaves are lanceolate to spatulate and rough to the touch.

 

Grindelia squarrosa – curlycup gumweed
Average number of good seeds per gram bulk matter: 420; 314 (depending on where collected)
Average number of good seeds per gram cleaned: 600
Commercial estimates of seeds per gram: n.a.
Percent seed: n.a.
Percent live: n.m.
Collection dates: October 20 and 21
Collection effort: 57 grams in 3 person hours
Collection notes: Easy to collect in large amounts. Rubbing alcohol is useful for cleaning sticky sap off of clippers and fingers.
Cleaning notes: Seed in bulk measurement was only scraped out of the involucres while the clean seed measurement was hard seeds only.

Did You Know?

fire on the prairie

Fire is an important factor in protecting the prairie. Historically, fires burned across the prairie every 4 to 7 years. Fires burn the small trees that would otherwise march across the prairie and turn the grasslands to forest.