The bloom on this plant is so small and insignificant that it is very difficult to photograph well.  The entire cluster of blooms is smaller than my little finger nail.  The entire peduncle of 10 blooms is less than 3/8″ across and 1/4″ high (For my metric friends that is 9.5 mm across and 6.4 mm high).  Each bloom is around 1/16″ in diameter (1.6 mm).  Here is a photo that is worth a thousand words; a single Hoya lacunosa flower next to a peduncle of 10 flowers from Hoya ignorata.

Worlds Smallest Hoya Flower?? Side By Side A Single H. lacunosa Bloom Against Ten of H. ignorata

Also want to take this opportunity to wish everyone a very happy New Year!  I really don’t think that 2015 will live up to 2014 as far as blooming new Hoyas for me.  In 2014 I was remarkably lucky, and that luck will be hard to duplicate.  Anyhow, my best wishes to all of you.  I hope you bloom everything that you have ever dreamed of blooming!