Aeschynanthus javanicus

Van Houtte, 1845

A. javanicus is now A. radicans, a synonym for A. lobbianus.  A. radicans is a variable species, but always characterized by large red flowers that emerge from a tubular calyx, reminiscent of lipstick emerging from a tube.  As a result, a number of variants of this species are referred to as "Lipstick Plants". 

Another print of a plant from this group can be seen here, and photographs of plants here and here.