Epidendrum schizoclinandrium

Kelly, I went through relevant plates of Icones Orchidacearum to understand your plant.

Following can be eliminated rather easily (the numbers in the parentheses are the fascicle and plate number in Hagsater's Icones Orchidacearum, link):

* E. oxynanodes (3, 363): shapes of sepals and petals are more elongated. The biggest flower in this group.
* E. uleinanodes (3, 392): clidandrium deeply fimbraiate. Basically it should look like the mustache is growing at the tip of the column.
* E. congested (9, 921): the lip is heart-shaped. I don't think that your plant has a tip at the tip of the lip if you flatten it.
* E. serruliferum (9, 986): the lip is heart shaped, and the point is more pronounced than E. congestum

Now the followings are a bit more similar to yours. So you might want to focus on these.
* E. gonzalez-tamayoi (2, 136): brilliant green leaves with purple margin, but the light intensity influence the purpleness. sepal 9-12.5mm. Almost always 2 green flowers. The apex of leaves bilobed and slightly jagged.
* E. congestoides (9, 920) : glaucous green leaves. Blueish/grayish green, sepals 6-7mm (yours is 10mm). So it is probably not this species.
* E. schlechterianum (9, 982): sepals 17-20mm.

I haven't examined these in details:
* E. schizoclinandrium: I don't think so.
* E. longirepens: Here is the original description by Schweinfurth (link. Here is the paper which raised it to a species (link). The differences between this and E. schlecterianum are mainly vegetative. This species have long creeping rhizome and small leaves. The flower is smaller than typical E. schlechterianum. But some E. schlechterianum flowers are quite small.
* E. neodiscolor: Original description (Nanodes discolor) is available in this link plate 1541 and the following page. But it doesn't give a detail. Hagsater consider it to be different from E. schlecterianum in this link. Check p. 217. But again, not enough detail, but it seems to imply the flower is smaller than E. schlechterianum??

E. longirepens description is interesting. With lots of photos of E. longirepens, I don't particularly notice the long rhizomes. I guess it might be more obvious when you see E. longirepens and E. schlechterianum side-by-side, but I haven't seen them in my hands. But I wonder if what we call E. longirepens isn't correct. Also Schweinfurth was probably using a wider concept of E. schlechterianum than Hagsater since he mentions that there are smaller flower plant in E. schlechterianum.

So I still don't know the ID, but my guess is that it is close to E. longirepens, E. neodiscolor (if you consider it is different from E. schlechterianum), small flowered E. schlechterianum, E. gonzales-tamayoi.

Tong, Hagsater's Icones Orchidacearum (link above) is pretty good to study about this group.

 

I think that you are probably right. The photo of the anther cap clearly shows that it is not E. schlechterianum, which has quite elongated shape. I have forgotten about the details, but I took a look at Hagsater's Icones Orchidacearum (I'm glad I took a note in the message above). I compared E. congestoides and E. gonzalez-tamayoi. The anther cap looks similar to E. congestoides. Also look at the side lobes of the column. Yours has a big, and they have a bit of rectangular shape. E. gonzalez-tamoyoi has more rounded side lobes. Also the margin of the lip midlobe seems to hvae the look of E. congestoides, which is emphasized in the illustration. So I think E. congestoides seems to be the best match. Very cool that you figured it out!