oak branch with dry leaves in autumn

acid acorn badnjak bark beech branch calybium cattle christmas coffee constipation corks cupule deciduous diarrhea dry ecosystem edible european extinction flour fodder forest fruit fuelwood furniture gall gastroenteritis hardwood ink leather leaves limb livestock log lumber making monoecious nut oak oakwood pests poisonous quartersawn quercus roasted shrub tannin tanning threat timber tree tribes truffles veneer veneration wild worshiped yule