What are these? They were all over the ground near a tree in Georgetown. : r/washingtondc
The gall of that oak tree! | Opening the door, walking outside
What are these green balls on my tree? Also what kind of tree is it?? : r/ Tree
The Monkey Balls of Pittsburgh - The Incline
Plant Profile: Osage Orange - Discover + Share
Fruit Like a Brain and Wood Like Steel
Mountain Glen Farm Journal: Black Walnuts
Not tennis balls, but ...
Sebastopol's mysterious balls of leaves solved. It's mistletoe
Giant Green Ball (Tree Fruit) PA : r/foraging
Tree in Ohio. Small apple sized fruit with citrus smell. : r/whatsthisplant
Osage Orange - Eat The Weeds and other things, too
Walnuts or Tennis Balls?
Maclura pomifera - Wikipedia
What are those bumpy, yellow-green things on the sidewalk? Meet Osage orange tree's fruit - cleveland.com
green balls
Dr. Dirt: Galls cause little or no damage to host trees
Close-up Photo of a Coconut a Big Green Ball on a Coconut Tree Stock Photo - Image of fruit, green: 256515080
Garden Guides | What Type of Tree Has Green Balls?
Your black walnut tree is out to get you | CAES Newswire
Maclura pomifera - Wikipedia
My Osage Orange Trees - The Martha Stewart Blog
Oak Galls: What Are Oak Galls | Davey Tree
Amazon.com: SLEETLY Large Green Ornaments for Christmas Tree Holiday Xmas Decorations for Christmas - Shatterpoof Plastic 4.72 inch Glitter Snow Balls and Clear Swirl, Ornament Set of 4 : Home & Kitchen
The Truth About the Tree That Grows 'Brains' and Scares Small Children