Those pics are consistent with K. fedtschenkoi. I love those plantlets too!
They are part of why I have enough plants some summers to make a statement in my landscaping. Those form on the stems that I've cut to enjoy the flowers over winter, and you probably already discovered that removed leaves make tons of babies too. Some winters I save more than others.
Annie's Annuals has some for sale, but I don't like the price.
https://www.anniesannuals.com/...
I need to get my hands on a K. laxiflora plant to be able to see how it is different from K. fed & K. marn. MCG doesn't have any for sale. Walmart doesn't have K. laxiflora on their website, but that's not proof that it's not that or that there aren't specimens for sale at one of its stores.
@tofitropic , do you have K. laxiflora in your lineup? If so, could you take some pics? Do you have the other two?