• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Bouteloua gracilis

Bouteloua gracilis - Blue Grama

Bouteloua gracilis - Blue Grama

NPS Graphic

Species: Bouteloua gracilis
Common name: blue grama

Vegetative identification: Blades narrow, drooping and usually smooth except at the collar where there is a tuft of hair sticking out from each side of the collar.


Bouteloua gracilis – blue grama
Average number of good seeds per gram bulk matter: n.m.
Average number of good seeds per gram cleaned: 191 (98)
Commercial estimates of seeds per gram: 1819; 1596 (772)
Percent seed: 18
Percent live: n.m.
Collection dates: October 11 and 20
Collection effort: 120 grams in 10 person hours
Collection notes: Abundant and most plants flowered but again many seed heads were empty.
Cleaning notes: Cleaned seed was with empty florets but stripped from rachis.

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.