This tiny and rather insignificant native orchid has usually been identified, and sometimes still is identified, as Listera caurina. It is found in the northwest as far north as lower Alaska, as far south as California, and as far east as Wyoming. It is said to be especially abundant in the Olympic Mountains of Washington, but is quite common throughout its range.
The plants we have seen have usually been from 10-20 cm tall, but is said to grow as tall as 30 cm. It has two opposite heart-shaped leaves about halfway up the stem and has a good number - up to 25 - small green flowers that have two darker stripes on the sides of the lip and that are diagnostic. We have found it blooming in open areas, especially along the trails.