Never saw this before, thought it was a fungus, but no; these are former homes of gall wasps who specialize in setting up housekeeping on the undersides of oak leaves. Taken yesterday. Latin name Cynips quercusfolii. Say that and you've said a mouthful.
2 comments:
Unless there's a hole in the side of it, I think the wasp larva is still inside there. You could carefully cut it open to find out.
WOW! That's sooo neat! What beauty and great form! Too amazing :)
Chris
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