Lucille Pope's red oak tree has baffled tree experts, water specialists and nursery professionals. The knotted, towering tree, more than 100 years old, has become the root of scrutiny in her East Side neighborhood. The tree has gurgled water from its trunk for the past three months. Pope, 65, has sought answers from several specialists, calling experts from the Texas Forest Service, the Edwards Aquifer Authority and nurseries for an explanation. They've combed her backyard, probing the gnarled tree that leans away from a parked white 1980s Cadillac. After snapping pictures, doing taste tests and conducting preliminary studies, they're still working to give her a definitive answer. "I got a mystery tree," Pope said. "What kind of mystery do I have where water comes out of a tree?" The odd occurrence started in early April when her son, Lloyd Pope, noticed bark smeared with sap when he went to fill his the water trough of his stepson's dog Neno. After moving the Rottweiler's tray, he saw a wide stain that ran from the root up toward the branches, with fluid dripping to the ground from above. Days later, he saw water streaming onto the ground from the other side, and he showed his mother the sight. Lloyd Pope, 47, said the water was cool, like it came from a faucet. The only damp spot around the tree trunk is where the water lands. The peculiar incident has the Popes wondering if the water has properties not found on tap.