They grow from acorns

• Red and white, among others
• Acorn sources
• Symbols of might
• Stoke are playing - the epitome of Englishness?
• Hardwood sources
• Sherwood Forest dwellers
• Acorns, someday
• Homes for some squirrels
• Shade providers on the Wilkes plantation, in "Gone with the Wind"

Wiktionary Word definitions in Wiktionary
n. (plural of oaktree English)