47. What are those? Oak Galls — Rhyne Designs Landscape
Oak apple - Wikipedia
What is an Oak Apple? : Sycamore Land Trust
Growths on Oak Leaves and Twigs :: Melinda Myers
Blame Wasps And Squirrels For All The Oak Leaves On Your Lawn | STLPR
What Is Wrong With My Tree? Gouty Oak Gall
How Wasps Make Beautiful and Complex “Oak Apples” | Brandywine Conservancy and Museum of Art
What are These Strange Orbs on My Oak Trees? - Gill Garden Center + Landscape Co.
Oak Galls: What Are Oak Galls | Davey Tree
The Cool and Unusual — San Diego Canyonlands
Home, Yard & Garden Newsletter at the University of Illinois
What is growing on that oak tree?
Oak galls galore - Neil Sperry's GARDENS
Tree galls are rarely cause for concern - Forestry
Oak Galls and Mistletoe: Nature's Decorations - The Real Dirt Blog - ANR Blogs
Oak Apple Wasp Galls | BYGL
Oak Gall Wasp | From the Ground Up - YouTube
What is growing on that oak tree?
Oak Galls - Tree Top Nursery & Landscape Inc.
Don't eat the wildlife!
Whole Oak Galls - Botanical Colors
Oak trees have a lot of gall - 'oak apple gall,' that is
What Are Oak Apple Galls? | Gardening Question - New England
Brown balls on oak trees aren't harmful | San Luis Obispo Tribune
The Magic of Oak Galls — honey folk clothing
Galls on Oak Leaves and Twigs | Horticulture and Home Pest News
