Broken Dendrobium Rooting & Potting Advice

[moonflower]

Today the Orchid Gods smiled down on me and I managed to snap up 2 dendrobiums at my local Home Depot just as they were marked down to.....hang on to your hats!.....$0.96!!! One I bought (labeled as white, but looking more like very pale key lime pie) I have just discovered is broken at the base. One "stalk" is sturdy and intact but the other is broken, almost completely, just above the growing medium. My question is, can this "stalk" (proper terminology here??) be saved? Can it be forced to grow roots should I remove it completely? Also, the potting medium looks like a solid chunk of bark.....it's hard and brown, looks kind of like a slab of barkish/corkish stuff. Should I repot OUT of this into medium mix containing charcoal, etc? My OLD dendrobium has 15 flower spikes on it, so I'm fairly successful growing these, but this one has me stumped. I also have an oncidium, cattylea, mini cat, & a phal. Thanks for all incoming advice!!