The 1st one appears to be Phal. schilleriana or stuartiana or one of their hybrids. The second one with the yellow border appears to be a variegated Phal. The 3rd one, in my estimation, other options wanted, is an unhealthy (diseased?) Phal. The last one I really can't tell until it blooms, maybe Oncidium. It would like higher light levels than the first three
If you copy the stuff between [IMG] and [/IMG] and paste it into the URL box of a new browser tab, it takes you to a Flickr page. There you can see the photos.
dklswh, if you edit your comment, remove the [IMG] tags and insert http:// in front of the www in your URL, it may display properly as a link.
As to the photos - I agree with the previous comments. I am quite worried about the yellow-leafed Phal. If it has been this way for some time without getting worse, I would suspect a viral infection.
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The third, in spike is an Oncidium . One of the Twinkles probably. I agree with Estacion. The large Phal is troubling. I have one with faint spots similar to that but, they are environmental. I think I would chuck that one.
4th photo is an Oncidium, probably a Twinkle or something similar. The 3rd photo looks like Rhynchostylis gigantea, or a hybrid dominated by that species.
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