Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. var. hyemalis
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Variety Description - Blooming early, March to July, occasionally persisting until autumn; spikelets short-pediceled, therefore aggregated into small terminal clusters, the pedicels 0.3–2 mm, avg under 1 mm; glumes 1.2–2.4 (avg 1.5) mm; Mass. to Fla. along the coastal plain, n. in the interior to Io. and Ind.