Taprooted annual 1-3 dm; stems glabrous or nearly so, usually with several branches; lvs lanceolate or ovate to oblong or elliptic, 1-6 cm; cal-lobes narrowly triangular, half to three-fourths as long as the tube, pubescent to the acuminate tip; cor pale yellow to white, 10-16 mm; 2n=34. Native of Europe, rarely intr. in our range.

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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