A S. Amer. sp. with the bracts shorter than the strigose cal, is intr. in se. U.S., and n. as far as St. Louis, Mo., and may be expected 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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Notes: Corolla salverform; 2-lobed upper and 3-lobed lower lips, lobes imbricate.Inflorescences 3-4 cm long.Calyx somewhat glandular.Stems 4-angled.Stamens didynamous. References: Kearney & Peebles; Arizona Flora. ASU specimans