Answer: I think your tree is actually Eucalyptus calyo, commonly known as red gum. If it has rough, flaky bark, greenish-white leaves, greenish-white flowers with white or pink stamens, I'd be even more sure of its true identity. Eucalyptus come mostly from Australia and grow well in the southern U.S. I hope you're keeping it indoors; it won't tolerate cold weather! If it is eucalyptus, your plant may be suffering from too much water. Since it's wintertime, a normal period of rest for many plants, reduce the amount and frequency of watering. In the spring, cut back the wilted stems and branches and new, healthy growth will follow. Try to provide as much light as possible, supplementing with gro-lights or fluorescent lights to provide at least 12 hours of light each day.
I hope your plant regains its health!
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