Hoya bhutanica (IML 0224) came to me as a cutting in 2009 and bloomed in the fall of 2012.  It is a native of Bhutan with 75mm ovate, elliptical, veined leaves.  The flowers are extremely fragrant, but have a short lifespan of around 4 days.  I have found that this Hoya likes to be grown warm and humid or can easily be susceptible to root rot.  I lost all of the buds from multiple peduncles when I over watered in a cool greenhouse. I got it to re-bud and open flowers quickly by re-potting with a two inch layer of hydroton on the bottom of the pot, and placing the plant into a very warm and humid grow-tent.  I have filmed a video tour of the plant and flowers including a time-lapse of the flowers opening titled: A Visit with Hoya bhutanica it can be accessed here: http://youtu.be/5Rs0RbzawPY

Here are a gallery of photos: (click on any to see full-sized)