Is it a native?

Veldt-grasses - introduced (*Ehrhartia)

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The grass plant
Other Veldt grasses

Spikelets with two sterile lemmas and one fertile lemma. The three lemmas fall as a unit.

Annual Veldt Grass (Ehrhartia longiflora) . Flowers shades of purple and green. Flowers with awns. Flowers drooping on slender stalks.
Panic Veldt Grass (Ehrhartia erecta) . Flowers on slender stalks at right angles to main stalk. Flowers not awned. Lemmas with distinctive corrugations.
Perennial Veldt Grass(Ehrhartia calycina) Flowers on slender stalks, not conspicuously drooping. Perennial

Ehrhartia: After F Ehrhart, an 18th century Swiss botanist.