Quercus gambelii (Gambel's Oak, Rocky Mountain White Oak) [Home] | [Books] | [Links] | [Message Board] Click photo to enlarge More Photos: Habitat: Foothills Edibility: Inedible Color: Green Description: Acorns are edible if tannins are leached out. This can be done by boiling in several changes of water. Squirrels store acorns for winter.