Has anyone seen flowers on Sweet Potato

[Whwoz]

Having not long started growing Sweet potatos Down Under and noting a very limited range from which to select slips and having seen the range available at Sandhill, I got to thinking that the only way to try and get something a bit different would be to cross the existing clones that I can access. For this I need flowers, which I never looked for last season and thought I would ask here if anyone has seen flowers/seedpods or if anyone knows if they only occur under certain conditions.

Thanks if you can help.

Woz