Help with growing cuttings?

They look like they are Mums. I would say get some potting soil and pot them up in 2-4" pots to start. Water and allow to go near dry or just dry and water again. Keep them in bright light.

edit: While rooting hormone certainly wouldn't hurt. I don't think it is necessary as they are already starting to root. If you do it now the roots shouldn't have a hard time to re-acclimate. Roots that develop in water for long periods have root systems developed for water and may have a harder time readjusting when potted up. If you can find sterile potting soil that would help against fungus. Do not pot in to large of a pot to start as it could lead to rot or fungus.

Flowers with a hard stem, such as roses can be transplanted using a cutting (only) if the flower is removed. The flower in most cases takes too much energy from the plant to keep it alive for transplanting. Always avoid the stem with flowers and give it 3 to 6 weeks to begin rooting in soil or place in a jar and carefully plant in soil after 3 to 4 days.

Buy a small bag of propagating mix, (it is a type of sandy soil,) and some plant hormone powder, or even some honey. Put the mix into a plant pot and wet with water. Then dip the ends of the cuttings in the hormone mix, and/or honey, make a hole 2" deep in the mix with a small stick, put the cutting in and firm the soil around it. Keep moist, not too wet, and see what happens.

If you want to grow cuttings they need to have green foliage in order to survive or at least nodes on the stem that can send out leafy shoots. A flower on a stem cannot survive because it has no way to make food and generally no way to send out more leaves. Similarly, an individual leaf generally can't survive because it has no means to send out roots.

On the other hand, it's easy to root most leafy cuttings. It helps to dip the cut end into rooting hormone, a white powder you can get anywhere. Then plant it in damp soil and keep it damp.

remove any flower, but let the leaves remain.... plant in a nice potting mix and keep it moist, not soggy... and you just might have a plant.... don't be upset it if doesn't work past a certain point.... flowers are boosted with growth hormones to bring them to market and when those run their race and finish,there's likely to be little left for the plant to do amazing things like shoot roots off a flower stem with.....

It certainly looks like they're trying to grow, it can't hurt to pot them, keep them in a sunny, warm area, such as near a window and water daily. It cannot hurt to try.