This plant is indicated here as a cultivar:
I couldn't find this plant listed on MOBOT, as a plain species or cultivar, though some of the pics in the entry were taken at their garden. They way the name is written on the label in 2 of the pics indicates it's a cultivar also. I'm not always successful in searching for them even when they are valid, but couldn't find a patent for this name, probably because it's also the usual common name. If it is a cultivar, I better get to work finding one!
Also interesting is how the flowers in the pics of the MOBOT plant show this is not K. luciae, but the reddish foliage breaks the 'rule' that K. tetraphylla/thyrsifolia doesn't make red leaves.
I feel like the more I study these plants, the more confused I become.