Oryza sativa L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Annual 1–2 m; blades elongate, 8–15 mm wide; panicle 1–3 dm; lemma 7–10 mm, reticulate rugose, short-pilose, its awn, when present, to 5 cm; 2n=24. Asiatic cultigen, cult. in s. U.S. and occasionally adventive as far n. as se. Va., but not persistent.