Agrostis stolonifera L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Much like no. 2 [Agrostis gigantea Roth], and perhaps not sharply distinct, but not rhizomatous, though sometimes with stolons; panicle greenish or stramineous, seldom over 10 cm, narrower, especially after anthesis, with ascending or erect branches; 2n=28–46. Native of Europe, cult. and intr. as in no. 2. Two confluent vars.