Aeschynanthus radicans

Van Houtte, 1848

A very good representation of the species, as can be seen here.  A. radicans is a variable species, and this form is more frequently known as A. lobbianus, the lipstick plant.  The red buds emerging from the tubular calyx is thought to resemble lipstick emerging from a tube.

Another print of a plant from this group can be seen here.