Muhlenbergia richardsonis (Trin.) Rydb.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Culms clustered, 3–6 dm, very slender and wiry, minutely roughened at the nodes, erect or often decumbent and rooting near the base, forming mats, but the plant without rhizomes; ligule 1.5–3 mm; blades usually involute, 1–2 mm wide, erect or ascending, the main ones 3–6 cm; panicles 1–4(–7) cm, slender, with short, ascending, scarcely overlapping branches; glumes lance-ovate, glabrous, the first 0.9–1.3 mm, the second 1–1.5 mm; lemma glabrous, obscurely veined, 2–3.3 mm, tapering to a subulate point; 2n=40. Wet gravelly soil; Anticosti I. to Me.; s. Mich.; Minn. to Wash. and N.M.