What sort of seed pod is this?

Question

My son found this floating in a stream in Massachusetts, in the northeastern US. It was intact when he found it, but he cracked it open to see what was inside. I did some Google image searching, but couldn't find anything. Any idea what it is, and where it came from?

Are there any trace of a hole through which a bug could have entered? The content looks messy. Can you isolate seed ? — bli, Oct 13 '15 at 15:10
@bli no, there weren't any holes in it. I haven't dug around in it, but I can take a look for seeds when I get home from work. — MattDMo, Oct 13 '15 at 16:29
Looks like a gall. was it delicate and lightweight? If so I'd guess it belongs to the oak apple gall wasp — theforestecologist, Dec 10 '15 at 05:13

theforestecologist · Accepted Answer · 2017-02-21T20:11:08.410

4

It's actually not a seed pod, but rather a gall (see here or here for more info about galls). Specifically, it most likely is a gall belonging to the Oak Apple Gall Wasp (Amphibolips confluenta). You can read about this species and its gall here.

edited Feb 21 '17 at 20:11

answered Jan 08 '16 at 04:47

theforestecologist

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Yes, it was quite light for its size, and I suppose "delicate" could be used, but it was certainly difficult to cut open :) – MattDMo Jan 08 '16 at 14:10

What sort of seed pod is this?

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