Identification: What is the name of this unusual wild plant?

What is the name of this unusual wild plant? The first picture was taken 2011-05-19, the second 2011-07-18 and the third 2011-08-17. The flower stalk on the third picture is over 2 ft. tall.

 

Piperia elongata, the denseflower rein orchid, I think.

 

Thank you Daniel.
The flowers on my plant are not completely green, rather light yellowish-green, the flower stalk on my plant is over 2 ft. tall and the flowers and seeds spaced much more densely than at your link, but those things may vary depending on the growing conditions I believe.

 

The height of the plant ranges from 20-100cm tall. Did you view all of the photos in the associated photo gallery? I think the ones from the second set by Rod Innes match the plant you've pictured for density of flowers...and on the second page of the gallery, the photos from Jamie Fenneman seem to have lighter-coloured flowers.

 

They grow here on my property in the West Kootenays under/close to Pine trees. I have even seen one with variegated leaves.