I started black-eyed Susan (Rudbeckia hirta) seeds in a tray - you can recognize her seedlings by hairy true leaves. However, I noticed there is another type of seedlings of unknown origin, that looks differently:
Apart from having different leaves, they are also legier. From different angle:
There is another one that appears to be of the same kind in another cell:
From different angle:
They are the only two of such kind in my 44-cell tray.
What are they, and what to do with them?