Lobbii or javanica would be my guesses, because they are common hoya. Without seeing the whole plant, I cannot rule out other species.

Isn't javanica the one that is often mislabeled as multiflora? They both seem to have wider light green ripply/ribby leaves. (can't explain it.. Gah! ) These leaves are very dull. I have a Muliflora (or javanica?) and it looks nothing like the mystery hoya..

Off to google lobbii.. :D

H. lobbii seems to have clusters of flowers without a peduncle? This hoya has a long branch like peduncle like the above mentioned Multiflora. The plot thickens...

There are a few different clones of multiflora. The one i have has the dull like leaves that are NOT ripply. But the more common form of it has the ripply leaves. Mine came from Gardinos.

Here is a multiflora sv 406 that i had pulled for me from thailand but decided not to get it......

and here is a multiflora with the rippled leaves..

There are plenty that it could be...those two were my first guesses, as they are common.

It could also be many other types.

Lobbii does have, and blooms from, peduncles.

Well, it was labeled Multiflora :D But it really dosen't look like the other one I have. Do some of them have splotches? All the photos seem to show un spotty leaves...

Hmm, that could be it :D