Bottle gentian is most often found in moist areas near streams and ponds. Typically grows 1-2′ tall and features tight clusters of tubular,deep blue flowers which never open. The closed flowers have a tiny opening at the tip and are pollinated by bumbleb ... ees that push their way in. Flower clusters appear at the tops of the stems or in the upper leaf axils in late summer to early autumn. Best in part shade areas.