Nature Done Wright

Alice Leurck, who posed the mystery, writes:

This mystery was happily solved for me on the Native Plant walk Don Torino gave at Teaneck Creek last month.

I had photographed this weed along the Celery Farm's Parnell's Path on 7/25/2015, and fleetingly wondered what it was. 

Never got around to trying to figure it out.  There it was at Teaneck Creek, and Don identified it as Nutsedge.

Congrats to Deedee Burnside for IDing it correctly, and thank you to Alice Leurck for the mystery photo.