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Photo#711016
Warty clump on young oak - Callirhytis seminator

Warty clump on young oak - Callirhytis seminator
Des Moines, Polk County, Iowa, USA
October 2, 2012
Size: 2 inch x 1 inch
I found several of these on 2-3 year old white oak saplngs. On the bottom there structures that look like seeds.

Images of this individual: tag all
Warty clump on young oak - Callirhytis seminator Warty clump on young oak - Callirhytis seminator

Moved
Moved from Unidentified Galls.

Maybe something like

 
Host is right
Maybe this is indeed an old, dried-up wool sower, a fuzzy stem gall on white oak. The location of this specimen on the stem of a white oak would fit well with that assessment.

Where on sapling?
Hi Inger, where on the sapling was this clump located? On a leaf? Stem?

 
clump location
Hi John - I should go back and try to get a better pix. They were usually on the crotch of a branch as I recall. The underside that looks almost like seeds is where it was attached around the stem. We saw quite a few of them in a patch of oak seedlings ranging from 1 to 4 ft tall under some very large savanna oaks at MacRae Park, DSM.

 
Spider egg sac?
On the existing photos, I see silken threads exposed in the clump - I wonder if this is some kind of spider egg sac? Or maybe moth-related?

Moved
Moved from ID Request.

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