What genus? And, if possible, species or cultivar? Green Spring Gardens, Alexandria, Virginia

This could be the yellow form of the species Dendrobium secundum.

Yes indeed, thanks Ursula. Epidendrum secundum. I stand corrected.

Yes, non-resupinate = Epidendrum secundum or secundum complex! ( learned that at our Ecuador trip )
.... column/lip faces upwards

Thanks for that, Ursula! I'm still looking for where I found it shown because I have a noid that I had decided was secundum. I had no idea Epidendrom was such a huge/ diverse family...assuming they haven't renamed/reclassified many of them.