Penstemon digitalis Nutt.

• Authority

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

• Family

  Scrophulariaceae

• Scientific Name

  Penstemon digitalis Nutt. ex Sims

• Description

  Species Description - Stems to 1.5 m, glabrous and shining, often glaucous or purplish, varying to finely puberulent; cauline lvs narrowly oblong or lance-oblong to narrowly triangular, the larger 10–15 cm, glabrous or finely puberulent (especially along the midvein) beneath; infl 1–3 dm, with erect or strongly ascending branches, often glandular; cal 3–7 mm at anthesis; cor 1.5–3 cm, white or very faintly suffused with violet, usually marked with purple lines inside, the tube abruptly and strongly dilated into a wide throat; anthers pubescent or sometimes glabrous; 2n=96. Moist open woods and prairies; N.S. and Me. to Minn. and S.D., s. to Va., Ala., and Tex. May–July. (P. alluviorum and P. deamii, with relatively small fls and often puberulent stems)

• Common Names

  tall white beard-tongue