• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Bouteloua hirsuta

Bouteloua hirsuta - Hairy Grama

Bouteloua hirsuta - Hairy Grama

NPS Graphic

Species: Bouteloua hirsuta
Common name: hairy grama

Vegetative identification: Blade and collar have conspicuous glandular hairs, mostly on the upper surface but occasionally on the lower also. The collar has a larger tuft of hair on each side. The sheath is smooth and papery. The leaves are flat, short and drooping.

This species can be difficult to tell from blue grama or buffalograss while vegetative.

 

Bouteloua hirsuta – hairy grama
Average number of good seeds per gram bulk matter: n.m.
Average number of good seeds per gram cleaned: 313 (163)
Commercial estimates of seeds per gram: 1510
Percent seed: 23
Percent live: 42
Collection dates: October 11 and 20
Collection effort: 50 grams in 10 person hours
Collection notes: Look for in areas with lots of bare soil. It appeared to produce more seed in an area that was burned in 2001 or 2002.
Cleaning notes: Cleaned seed was stripped from rachis but included empty florets.

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