This photograph from a resort garden in Bukit Tinggi, Malaysia is courtesy of Lindsay McGhee, a UBC biology student. Lindsay is working with me on the garden’s John Davidson project. Thank you, Lindsay!
If you attempt a search for images of Hoya pubicalyx, you are likely to find photographs of the red- to dark-coloured cultivated forms of the species, e.g. Hoya pubicalyx ‘Silver Pink'”. However, I am fairly certain that white to pink is the typical colour range for the flowers of this species in the wild.
For an introduction to the diversity within the genus Hoya, visit the online photograph gallery of the International Hoya Association. Similarly, a written introduction to the genus Hoya in Singapore and Malaysia is available from the Nature Society of Singapore.