Hello,
This is a terrestrial orchid native to Argentina and Bolivia I think.
It may be mistaken with
Sacoila lanceolata, that grows in Argentina, Bolivia, Brazil and may be Paraguay; and the difference is that lanceolata has pink/salmon flowers, and argentina has light yellow flowers.
I collected those plants in a field of mine, and they are really easy to find. I really like growing terrestrial orchids.
It is growing in a plastic pot, with a substrate composed by sphagnum moss, common earth, some organic materials like leaves, and a little bit of black stones for the drainage.
(I will try to learn to translate better all kind of materials I use for growing my plants, so I can explain myself better and you can understand me)
Hope you like it.
Hugs!
The links below the images is for the largest view.
http://farm4.static.flickr.com/3194/...174d9fd6_o.jpg
http://farm4.static.flickr.com/3169/...2394c74b_o.jpg