Color, blue, sometimes plaited with white, when old turning a reddish purple. Calyx, tubular, with linear, recurved lobes. Corolla, tubular with closed or nearly closed lobes, with intervening broad appendages or plaits. Stamens, with anthers joined making a tube. Leaves, starting from a narrow base, become broader in the middle, acute at apex, whorled or opposite. Flowers, in clusters, terminal or several in the upper axils, crowded together, 1 to 2 inches long. August to October.
Moist ground, low woods, from Maine to Georgia and westward to Missouri. This would seem, of necessity, to be a self - pollinating flower. But bumblebees have been seen cutting their way into the closed corolla, and in their search for nectar they may become pollen-carriers to another flower. It is not uncommon to see the petals lacerated. (See illustration, p. 327.)
Closed or bottle gentian (Gentiana Andrewsii)