Stems 2–6 dm, mostly simple, minutely papillate-puberulent, often to some extent in lines; lvs firm, lanceolate or lance-oblong, mostly 2–7 × 0.5–2 cm, tending to be minutely scabro-ciliolate or papillate-ciliolate along the margins toward the base only, and along the midrib on the lower side toward the base only; cal glabrous or very nearly so, its lobes linear or lance-linear, 4–18 mm; cor bright blue, 3.5–6 cm, wide open, the free lobes, above the fimbriate and shallowly bifid plaits, 4–8 mm, broadly ovate or elliptic, acute or abruptly acuminate, ± spreading; anthers separate; 2n=26. Prairies and dry upland woods; w. N.Y. to Man. and N.D., s. to W.Va., Ky., n. Ark., and Kans.; La. Aug.–Oct. (G. puberula, misapplied)The closely related cordilleran sp. G. affinis A. Gray has been reported from n. c. Minn. and Huron Co., Ont. It differs in its smaller cor (mostly 2.5–4 cm) and unstable cal, the lobes variously large or small, commonly unequal, sometimes virtually suppressed, the tube often once or twice cleft especially when the lobes are reduced. The lvs are also a little more definitely scaberulous-margined ± throughout their length.
Can be grown by cuttings, divisions or seedlings. Seeds needs stratification.
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