Rhizomatous perennial 3-5 dm; petioles 1 cm; lvs ovate-oblong or triangular-ovate, 3-6 cm, crenate, truncate to shallowly cordate at base; racemes few to several, terminal and axillary, secund, 1 dm; bracts ovate or lance-ovate; pedicels 1-3 mm; cal 5-6 mm, the upper lobe broadly depressed-ovate, apiculate, the others triangular, subulate-tipped; cal reticulate-veiny at maturity; cor greenish-yellow, 1 cm, the tube much exceeding the cal; filaments nearly straight; 2n=32. Native of Europe, rarely intr. in our range, reported from Ont. and O.

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

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