Seed Study - Grindelia squarrosa
Species: Grindelia squarrosa
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?
Winds caused by changes in barometric pressure are what give Wind Cave its name. These winds have been measured at the cave's walk-in entrance at over 70 mph. The winds at the natural entrance of the cave attracted the attention of Native Americans and early settlers.