It should take a few weeks, you didnt bury the bulb to deep did you? Do you know what color she gave you? I have the purple one and I've had it for years. Your going to love it !!!
Christine

I don't know what variety is. The only thing I can remember from the bag was that it said Oxalis on it. I pit the bulb about an inch deep and am keeping the potting soil slightly moist and on the floor near the heating hot-water radiator. I felt the pot and it didn't feel either cold or hot.

I dont think you should have it by the radiator. Why dont you re-post this over in the houseplant forum, they know alot more than I do.
Christine