armeniacum is the most notorious parvi when it comes to stolon formation. It's as if you cannot possibly have two growths connected in a normal way. I've seen micranthum with and without stolons, but it is probably #2 on the most stolon paph list.
I have read that with regards to these paphs, the stolons give rise to new plants, that then fall off the parent plant and tumble down the limestone cliff, thereby making new colonies. Seems like a stretch to me.
Phrag. besseae (not dalessandroi) is also famed for its stolons. A funny story about my besseae--for the first 5 years I had the plant, these @@^$ stolons confounded me from keeping more than 2 growths in a pot at a given time. Then, all of a sudden, it stopped making them. Going on growth #3 in a normal habit now!