Cloud ears. Tree ears. "Dried fungus," "dried vegetable." What's the
difference?

A number of years ago, I cobbled my own recipe for Mu Shu Pork based on
a combination of cookbook recipes and what I could determine from
restaurant dishes I had ordered. I rather like what I've come up with.

But I've noticed that this key ingredient takes a number of
uninformative packaged forms in Asian grocery stores, i.e., "dried fungus."

Can anyone enlighten as to what to look for in purchasing this ingredient?