Uvularia grandiflora Sm.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stem 2–5 dm at anthesis, at maturity to 1 m, forking above, bearing (0)1(2) lvs below the fork, 4–8 on the sterile branch, and several lvs and 1–4 fls on the fertile branch; lvs perfoliate, broadly oval to oblong, to 12 cm, usually minutely hairy beneath; fls yellow, nodding; tep 2.5–5 cm, acute or acuminate, smooth within; 2n=14. Rich woods, preferring calcareous soil; Me. and s. Que. to Minn. and N.D., s. to Conn., Va., n. Ga., Ala., and Okla. Apr., May.