|Primulina dryas 'Hisako'|
The picture above was taken at the Ohio show in 2011 and at that time they were Chiritas. I've read that the name changed in 2011, so it must have been after this.
Primulinas are native to Sri Lanka, India, China, and SE Asia. Their care is pretty much the same as for African violets. I find that they are even easier. Because of their thicker leaves, they are more drought tolerant. I have mine on the same light stand as my violets, which receive 12 hours of light per day. Plus, they aren't fussy about humidity, probably because of those same thick leaves. They also prefer to be snug in their pots, like violets. I have 2 of these plants now, but will be adding more to my collection.
Hopefully, I've persuaded you to start your collection.