I really don't know why it took so long or, maybe, it was just the way it should be. This is the very first glimpse of the bloom. Obviously, it's not 'flat-stem' but it's one of those Hoya multiflora/javanica clones. Will check with GW to confirm its ID.
I expect I will see the full umbel by the end of the week???
My husband just informed me yesterday that the other one in Tuysonvien was loaded with buds, too. Hopefully next week when I'm back up there I will witness a grand opening!