Picture posting is enabled for all :)
It remains a mystery until you grow these seeds. Good luck.Have just come across this excellent description of the features (including seeds) of the various squash species. That should help with stray squash plants.http://alanbishop.proboards.com/thread/8400/visual-guide-identifying-squash
I'm still none the wiser, but I don't think a crookneck. Aren't they a yellowy colour even when they are tiny?I'll go leaf fondling when it stops raining.
What about a round pepo? One Ball or ronda de nice type. They come in pale and dark green. What about a cross between a pepo and a maxima?
Sibley? or Sibley-ish? looking at the embryo fruit, ie a cucurbita maxima? Maybe just a tad early to say, but that's what I make of your picture at this stage. Leaf fondling should confirm it or otherwise.
I have one or two trombocino or may be 15. And the leaves are not like that. The stems are much hairier. The leaves do not look moschata to me. I am still going for a pepo.
And what about your mystery squash Silverleaf?