Here is a photo of H. imperialis from yesterday morning, which keeps happily blooming along.  It will be the last photo of the flowers for some time to come.  I have had hundreds of flowers on this plant over the past three years, and I have taken every conceivable photograph of it, including several time-lapse videos.   I am thinking of giving the plant (along with a few other large ones) up in the spring to make room for more Hoyas.  So this may very well be the last new imperialis photo on this site.

Hoya imperialis from December 18, 2012