Soft-stemmed Bulrush (Schoenoplectus tabernaemontani)
Genus Schoenoplectus / Family Cyperaceae / Order Poales / Class Magnoliopsida / Phylum Tracheophyta / Kingdom Plantae
Soft-stemmed Bulrush in Prince George's Co., Maryland (6/29/2017). Determined by Bill Harms and verified by Wayne Longbottom.

Soft-stemmed Bulrush in Dorchester Co., Maryland (7/22/2018). Identified by Jim Brighton.
Soft-stemmed Bulrush (Schoenoplectus tabernaemontani)
Genus Schoenoplectus / Family Cyperaceae / Order Poales / Class Magnoliopsida / Phylum Tracheophyta / Kingdom PlantaeTotal Records: 2
Soft-stemmed Bulrush (Schoenoplectus tabernaemontani) - Map
For now, here's a fun heat map representation of my personal sightings in iNaturalist courtesy of iNaturalist.