Corallorhiza wisteriana Conrad
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stem 1–4 dm, purple or reddish; infl 3–7 cm, with 10–15 fls; sep and lateral pet extending forward over the column, scarcely spreading, narrowly lanceolate, 5–7.5 mm, greenish-yellowish, tinged with purple and marked with short purple lines; lip deflexed, about as long as the sep, narrowed below into a slender claw more than half as long as the blade, the latter broadly oval, crenulate, notched at the rounded summit, white, dotted with purple. Damp woods; Pa. and s. N.J. to Fla., w. to se. Nebr., Okla., and Tex., and in the w. cordillera. Apr.–June.