Sparganium

Sparganium, also called bur-reed, at Eagle Marsh, Allen County.  I am calling it Sparganium eurycarpum due to the apparent doubled styles on the pistillate flowers.  Photo taken May 31, 2014.

Link to Sparganium eurycarpum:

Sparganium, also probably Sparganium eurycarpum, on the west side of Coot Slough at Celery Bog Park, June 10, 2014.  Finding this small patch near one of the observation decks is the first time I've noticed bur-reed in Celery Bog Park.