Looks like Red Button.

Sorry for the stupid question but how can you tell them apart? I just looked at pics online and they look the same to me. I'm asking because I just got a Royal Hawaiian Purple. At least that's what it's supposed to be. No blooms yet.

I figure once you loose the tag you can't really be sure with these Hoya pubicalyx varieties. If all else fails just label the unknowns Hoya pubicalyx, the variety name is really not all that important.

Mike

From my own plants observation, the Red button tends have shorter leaves and the flowers are same color. RHP has longer leaves and the flowers seems to have different colors on a same umbel. It could be just mine.
Red Button.