Answer:
One to three feet (30.48 centimeters - 0.9144 meters) is the mature size of the Queen Lady's Slipper (Cypripedium reginae).
Specifically, this wild orchid can vary considerably in mature height. It draws the visitor's attention because of its perfect bloom, sheathing leaves and stout stem. But it is becoming extremely rare because of encroaching development and relentless poaching.