State Rank Reason (see State Rank above)
Known in Montana from two historical collections (Flathead and Missoula Counties).
Caespitose annual to perennial. Stems ascending to erect, 10–60 cm. Leaves mainly basal, 2–10 mm wide, flat. Inflorescence of ovoid to hemispheric clusters of spikes of sessile spikelets. Spikelets cylindric, 4–10 mm long. Scales pale brown with a green midvein, 3–4 mm long, several-veined. Flowers: stamens 3; style 3-branched. Achene narrowly elliptic, dark brown, 3-sided, ca. 2 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)