What is this seedling please?

You are not making this too easy. Was there any more information on the packet, are they flowers, salad mix, border plants, climbers, what? It would be unusual to package just anything at all. Is a list of species included?

I have it from a packet of mixed seeds - it had a black triangular flat seed about 4 or 5mm long. The first pair of leaves have 2 lobes each, but each leaf is "U" shaped, so that the pair of leaves together look rather like the shape of a gene/chromosome pair. The second pair of leaves look like they will be heart shaped but are only just starting to unfurl.

I have it from a packet of mixed seeds - it had a black triangular flat seed about 4 or 5mm long. The first pair of leaves have 2 lobes each, but each leaf is "U" shaped, so that the pair of leaves together look rather like the shape of a gene/chromosome pair. The second pair of leaves look like they will be heart shaped but are only just starting to unfurl.

Damn, forgot about that ol' dash-dash- (space? return?)

It looks like Morning Glory, a climber, usually has blue flowers. Only problem is its very tender.

Thanx Ganggang

I have checked up on the web, and am now very exited (I lead a sheltered life) about having these in my garden. Hubby not too chuffed I think, as they are similar to convulvulus in appearance, but they are annuals so will not take over, I hope??