Dendrobium Detectives needed - what is it?

[Tami Bell]

I have two orchids I need help identifying what is on/growing on them.

First is a flourishing (but not flowering ) dendrobium (I think ) that has pin sized, black dots on some of the leaves. It seems to be doing well and giving me new growth but I'd like to know what the black stuff is.






The second is a very sickly looking dendrobium I am planning on repotting when my supplies get here, plastic pots, superthrive etc.

Looking at it this morning, I noticed something new growing I've never seen before and have no idea if it's good or not. It's a almost bright yellow stem with a rounded head that is bumpy. I hope the pics are clear enough to see what I'm talking about.







Thanks for looking and any help/advice.