2b. var. septentrionalis

Pl. 157 j

Leaf blades mostly 10–18 mm wide. Lemmas 3.5–5.5 mm long, rather thick and leathery, roughened. Anthers 1–2 mm long. 2n=40. May–September.

Uncommon and widely scattered in northern and eastern Missouri (eastern U.S. and adjacent Canada west to Minnesota and Texas). Bottomland forests, sinkhole ponds, ponds, margins of sloughs, and wet bases of bluffs along rivers, often emergent aquatics.