The name on that guy is not the accepted name, and I've had some confusion sorting out what its proper name should be. According to the OrchidWiz database, Er. convallarioides is a synonym for Er. spicata. So that's what mine had been tagged: Er. spicata, formerly Er. convallarioides. Wecan challenged this and showed me his Er. spicata and the plants were clearly different. On IOSPE, Er. convallarioides is listed as a synonym for Er. bractescens, which I'm quite sure mine and yours are. The IOSPE photo is not convincing, but the photo in the OrchidWiz database for bractescens is very similar.
I think there's confusion with convallarioides, so I'd suggest tagging it bractescens.
Here was my bloom from August. I'm quite sure the title, Er. spicata is incorrect. Note my camera was doing some funky color adjustment and things came out way to greenish yellow. The flowers were a cream colored white:
And here's Wecan's Er. spicata, just past halfway down:
I've just ordered Jim Cootes book, which has a color photo of bractescens, so I'll let you know how it looks when I receive it.
As for culture, there's no general culture for the genus because it's so large and variable. What I've read for bractescens is int-warm growing, keep evenly moist. I have mine in Catt level light and it's doing fine.