THIS PAPER. Consequently, Ohio Goldenrod and many of its fen or bog vegetative allies have become quite scarce, too.
Fringed Gentians don't poke their stems above ground until late in the growing season, and don't build sufficient momentum to flower until October. There were hundreds of the plants in this fen, and it would not be unlikely to find a few stragglers still holding flowers into November.
You or I are not the only ones to succumb to the lure of the gentian:
TO THE FRINGED GENTIAN
William Cullen Bryant