• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Andropogon gerardii

Andropogon gerardii - Big Bluestem

Andropogon gerardii - Big Bluestem

NPS Graphic

Species: Andropogon gerardii
Common name: big bluestem

Vegetative identification: Young shoots are reddish brown with sheaths that are very pubescent and flattened. Leaf blades have long hairs on the margins and upper surface of the blade.

 

Andropogon gerardii – big bluestem
Average number of good seeds per gram bulk matter: 22, 9, and 17, depending on collection site
Average number of good seeds per gram cleaned: n.m.
Commercial estimates of seeds per gram: 364
Percent seed: n.m.
Percent live: 59
Collection dates: September 7, 11, 12, 18
Collection effort: 578 g in 21 person-hours
Collection notes: Species is common in park, but flowering plants were rare in 2004 due to grazing and drought.
Cleaning notes: Bulk seed includes small pieces of stem, leaves, lemmas, glumes, etc.

Did You Know?

Natural Entrance of Wind Cave

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.