Is it a native?

Spider Grass - native (Enteropogon acicularis)

Native. Perennial. C4.

Family. Poaceae (Grass family).

A common grass in northern grasslands.

Other names: Umbrella Grass, Curley-windmill Grass.

Identification

The flowers are on terminal radiating arms (a windmill grass)
the 1st glumes is much shorter than the lemmas.
the spikelet has 2 or 3 long-awned lemmas
the leaves are flat
the ligule is a fringed membrane, 1mm long.

The awned lemmas give the arms a distincive spikey appearance. Spider Grass differs from Windmill Grass (Chloris truncata) in that Windmall Grass has dark, squared-off lemmas. The lemmas of Spider Grass are pale and taper to a point.

Enteron: intestine; pogon: bear; acicularis: needle-shaped, slender.

1: A fertile lemma with sterile lemma. 2: Portion of an arm 3: Freshly opened flower spray. The arms are not yet spread out. Runnymede. 2: The radiating arms. The name "spider grass" is apt. Natya.