White oak, Quercus alba, acorns and Burr oak acorns.   Two of my favorites.  Best eaten after blended in water and strained.
  Oak trees with rounded lobed leaf ends typically have less bitter acorns as do oak species with pointed tips to their leaves.   Blend acorns in water then squeeze out water through panty hose.  Water leaches away tannins, making nut meal sweeter.

Acorn bread recipe.

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Pin oak, Q. palustrus Muenchh.  Bark decocotion for dysentery also for edema of joints.    Inner bark infused with hot stone in gourd, tea for intestinal pain, problems (analgesic).
Chinkapin Oak, Quercus muehlenberghii Engelm.,  has a relatively sweet tasting nut.  Chop them or puree them in a blender with water, rinse through panty hose, cheese cloth or a sieve.  Follow nut bread recipe.

Native American Uses: Infusion of bark used by Delaware and Ontario nations to stop nausea, vomiting (antiemetic).

Chinkapin acorns slightly bitter.
Spanish oak on the Camino de Santiago, Northern Spain near Samos.

Live oak acorn, Quercus virginiana Mill., Fagaceae, left, and live oak leaf, acorn head below.  Filmed near Abilene, Texas.

I have eaten this acorn, which is often riddled with worms.  It is bitter, but taste is improved by mashing the nuts in water, puree them in a blender, wash again.  Then squeeze out the water by placing the mash in panty hose, cheese cloth or the like.

Refrigerate, add a little lime juice as a stabilizer, will keep for about a week.  Use on baked potatoes, in soups, salads, waffles, bread, corn bread, cakes.

Native Americans mashed and sun dried the acorn meat before using it for food.

Roots and bark blended with other oak bark to make various dyes: red, gray, white and yellow.  This oak used for tanning hides.

Live oak "acorn hats".  Acorns fall from the tree leaving their bonnets behind.  This oak stays green all year, does not shed its leaves.

This tree will support epiphytes much like mesquite, typically Spanish moss.

Native American Medicine:  Like other oaks the bark was boiled and decoction was taken internally for dysentery, diarrhea (tannins).  Bark and wood decoction used externally to treat wounds, inflammations, sores.  This decoction was also used externally to treat hemorrhoids, muscle soreness, tender joints.

Leaves were used to make bedding insulation under blankets for sleeping. 

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