Lavender2
Garden Addicted
Yeah, I saw it tagged 'Japanese' at some sources.... but the claimed origin is China. Maybe it lost it's scent somewhere between China and Japan.
Thank you everybody for your replies. Lavender2, I checked the links you provided, and Googled primrose jasmine. I am, now, convinced that is what I have. Thank you again!How about Primrose Jasmine, mesnyi. There are claims it is scented and claims that it is not.
But I think it closely resembles your double flowers.
Top Tropicals says it is slightly scented at night.
Top Tropicals
This link, not scented -
Easy Bloom