Platanthera clavellata protocorms?

[MichiganFairies]

I know this cardboard method of seed sowing is fairly new and not much is known about it so I think I have made a new discovery! I am not totally sure, but I believe these are protocorms of seeds I have sown with the cardboard method. The seeds were of Platanthera clavellata. Can somebody tell me if these are young protocorms or maybe just very large grains of sand?

[Subrosa]

Too early to be certain from the pics, but if they are protocorms it won't be long until you're sure.