Mutant plants? Help please :(

Got given some , apparently, white rhino autos.... never seen such strange plants. Should I get rid of them? They have been on 18/6 lights for 24 days and the leaves don’t even look like weed ... all leaves and heads tightly packed very dark green and look genuarally unwell

Any ideas / help much appreciated

Thanks

Im going to be honest. It doesn't look like weed. The ridging(or lack of) on the edges of the leaves is not typical of cannabis. There are some strange crosses out there. If it were me, I would just ride them out but maybe keep them away from others just incase of things like bad genetics allowing for disease and problems.
Definitely would agree that a nitrogen toxicity is likely.

Looks like that fresian duck strain. Those are weed plants, just got something weird going on. It doesn't necessarily mean it won't grow decent pot. If you've got the time and space, see what happens.

Nitrogen toxicity... http://www.growweedeasy.com/nitrogen-toxicity-cannabis

For every 20 or 30 seeds I start I get a plant with strange leaves like that. Mine appear to be genetic IDK.