Isotria medeoloides (small whorled pogonia or little five leaves) is a terrestrial orchid found in temperate Eastern North America. Its range is from southern Maine south to Georgia and west to southern Ontario, Michigan, and Tennessee. A population was found in Missouri in 1897, but the plant is no longer believed extant there. It has always been considered a rare species, often legendarily so. It has been called "the rarest orchid east of the Mississippi.