Many Oncidium type species and hybrids have this general appearance. Gomesa flexuosa (Oncidium flexuosum) is one common one, but there are many others. Knowing the size of the flowers, a good clear close-up of the flower, and a picture of the whole plant might help be more specific.
Upon googling Oncidium flexuosum, it does appear to look like it, and a whole bunch of other closely related oncidiums. I guess I should just enjoy my new little addition to my collection, and not worry too much about its lineage,
I think I bought the same plant from Lowes a few months ago, and I settled on flexuosa. Roots were in terrible shape, as you would expect, but it's doing well after repotting and I'm excited to see if I can get one more bloom out of it before the year is through!