Help! What kind of Odontoglossum?

[GraceJohanna]

A month ago I bought this strange looking orchid from Trader Joes. Recently her petals began dying, drying out and the stem turned yellow.

I decided to try and identify her, figuring orchid care isn't "one size fits all" and the instructions on the tag were actually killing my plant.

I've narrowed it down to Odontoglossum, possibly Cordatum....
My plant's petals were actually very long, very thin, pointed.
The toungue-like petal at center bottom is not short and heart shaped, but rather extended.
Also the petals are not rubbery, they feel like normal petals.

I greatly appreciate your bestowal of orchid wisdom unto me! If you have one like this of your own, how do you care for it?

PICTURES >> https://plus.google.com/photos/11365...01852310157697