• 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.

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