aroidgrower

Randy your plants are very nice I can ID them all but the messed up thing is most all colocasias that are sold are one species esculenta. All the forms are just cultured forms of that species.

Your first pic looks to be Xanthosoma Atroverins but with this group it is hard to get a exact name with out a flower but the blue coloration makes me think its this species.

The next is colocasia fontanesii so is the third

Next is Colocasia esculenta violet stem

and then last colocasia esculenta ruffles

Good luck growing them.