Gentiana andrewsii Griseb.
CC = Amb
CW = -3
MOC = 40
Family - Gentianaceae
Habit - Perennial forb.
Stem - Ascending to erect, to 70 cm, glabrous, sometimes multiple from base.
Leaves - Opposite, sessile and somewhat clasping, lanceolate to ovate, to 8.5 cm, simple, entire, with minutely ciliate margins, otherwise glabrous.
Flowers - 5-merous. Calyces tubular, to 25 mm, the lobes lanceolate and usually shorter than the tube. Corollas tubular, to 4 cm, blue to violet, closed at maturity. Free portion of corolla lobes inconspicuous, 1-3 mm long. Anthers often fused. Pistil 1 per flower, of 2 fused carpels, the ovaries superior, 1-locular, short-stalked, with inconspicuous nectary glands at bases, the style short or absent, the stigmas 2, persistent.
Fruits - Capsules, longitudinally dehiscent by 2 valves, with numerous seeds.
Flowering - August - October.
Habitat - Forest openings, upland prairies, glades.
Origin - Native to the U.S.
Lookalikes - G. saponaria, which occurs in Illinois but has not yet been reported from Missouri.
Other info. - This unmistakable species occurs across much of Missouri, though it is not common anywhere. The photos on this page represent var. dakotica, which ranges into the north-central U.S. and into Canada. This is by far the most prevalent variety in Missouri.
Photographs taken at Shaw Nature Reserve, Franklin County, MO, 9-12-2018 and 9-28-2018 (SRTurner).