Lobivia chamaecereus

This plant is known to old-timers like me as Chamaecereus silvestrii, and often was found among the very first plants in new collection, usually a pop received as a gift from kind friend. The plant is very resilient and if grown with plenty of sun light produces its bright flowers with ease. Despite it's soft green look, the plant readily sustains direct sun along with lots of heat, slowing down only at the hottest days.
It usually is considered a spider mite indicator plant, but when grown at bright light it actually not at all suffers from it's attacks. Since moving to CA I've never seen spider mites on that plant.