The European L. caprifolium L., with the cor 3-5 cm, white or yellowish, the tube sometimes purplish, not gibbous, glabrous within, occasionally escapes from cult.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.