• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Hesperostipa comata

Species: Hesperostipa comata
Common name: needle and thread


Hesperostipa comata – needle and thread
Average number of good seeds per gram bulk matter: n.m.
Average number of good seeds per gram cleaned: 39
Commercial estimates of seeds per gram: 254
Percent seed: n.m.
Percent live: 71
Collection dates: July 8 and 9.
Collection effort: 110 grams in 24 person hours.
Collection notes: Seeds disperse soon after maturing, so watch carefully. Large sized seed and long awns make collection slow and seed hard to pack into collection bags. Plan on collecting a lot more seed than you think you will need.
Cleaning notes: Cleaned seed measurement was mostly pure seed and awns. A few seeds were soft (therefore not counted) but most were hard.

Did You Know?

American bison on the Wind Cave National Park prairie

The American bison is the largest terrestrial mammal in North America. Male bison can weigh a ton and can run 35 miles per hour. Do not approach bison. They weigh more and can outrun you. More...