Hoya cv. Kaimuki is a cross between H. archboldiana and H. macgillivrayi.  I thought it would be interesting to compare the two since I am lucky enough to have both plants flowering at the same time.

Hoya cv. Kaimuki on the Left; Hoya macgillivrayi on the Right – April 2015

Hoya cv. Kaimuki on the Left; Hoya macgillivrayi on the Right – April 2015