The FIVE-FLOWERED or STIFF GENTIAN, or AGUE-WEED (Gentiana quinquefolia; G. quinqueflora of Gray) has its five-parted, small, picotee-edged blue flowers arranged in clusters, not exceeding seven, at the ends of the branches or seated in the leaf-axils. The slender, branching, ridged stem may rise only two inches in dry soil; or perhaps two feet in rich, moist, rocky ground, where it grows to perfection, especially in mountainous regions. From Canada to Florida and westward to Missouri is its range, and beginning to bloom in August southward, it may not be found until September in the Catskills, and in October it is still in its glory in Ontario. The colorless, bitter juice of many of the gentian tribe has long been valued as a tonic in medicine. Evidently the butterflies that pilfer this "ague-weed," and the bees that are its legitimate feasters, find something more delectable in its blue walls. A deep, intense blue is the CLOSED, BLIND, or BOTTLE GENTIAN (G. Andrewsii), more truly the color of the "male bluebird's back," to which Thoreau likened the paler fringed gentian. Rarely some degenerate plant bears white flowers. As it is a perennial, we are likely to find it in its old haunts year after year; nevertheless its winged seeds sail far abroad to seek pastures new. This gentian also shows a preference for moist soil. Gray thought that it expanded slightly, and for a short time only in sunshine, but added that, although it is proterandrous, i.e. it matures and sheds its pollen before its stigma is susceptible to any, he believed it finally fertilized itself by the lobes of the stigma curling backward until they touched the anthers. But Gray was doubtless mistaken. Several authorities have recently proved that the flower is adapted to bumblebees. It offers them the last feast of the season, for although it comes into bloom in August southward, farther northward - and it extends from Quebec to the Northwest Territory - it lasts through October.