The flowers are the key feature for identifying many of these, as you've found out. Way too few are unique, and that's just when you're trying to identify the genera involved in a hybrid, never mind the species that were mixed.

Thanks for your help...as for the etiolation, I'm not totally sure what to do because I keep them in a room with windows on east, west and south sides and full spectrum lights shining on them 12 hours a day. The problem is I live in an apartment building so I don't have a patio or space to keep them outside when the weather is nice. Any suggestions for how to give them enough light indoors?

How far are the plants from lights?

From the artificial lights, it ranges from right on top to maybe 1-2 ft away. The sedum is a foot or so away from the nearest light but the light isn't directly facing it (its the one on the windowsill in the square blue pot in the middle)

That distance could be why...and also, it depends on lights you are using.

I use lights for about 6mo/year. Plants are much closer, some as close as 2". I do not think any are further than 8-9". Others keep them further away. But I make sure plants are well acclimatized to good light.

I use bulbs or tubes with high kelvins, most are 6500k, few bit lower. IMO, 4000k is quite low, I would look for min 5000k. And lights are directly above plants. They are all on timers, 12hrs on - 12hrs off.