Aw, Hetty, you're well-educated in plants the way it is and we learn a lot from you. I luv those and I'd be surprised is that isn't a Blackberry "Lily" (which is not a true lily). If not, it's sure a dead ringer.
This is a blackberry lily the leaves look like iris (same family)
It has a curious habit of coiling up the flower petals when done blooming (you can see in the background of this photo)
Some people call the other colored ones candy lilies.
Aha! That Pardancanda is a hybrid from the Belamcanda chinensis. Copied this off the site Lin posted:
"This Park introduction is a cross between Pardanthopsis and Belamcanda.
Belamcanda chinensis is a wildflower from china that looks almost identical but the new cross has a much larger color range.
Foliage looks like the leaves of Iris but is less sturdy "
So, is the original posting a wildflower, or would it more likely be the hybrid?
Confidence is that feeling you have right before you do something really stupid.
I found one the same which somebody asks if it's Iris domestica rosea, there was no reply. Iris domestica is now the correct name for Belamcanda chinensis, the Plant List doesn't recognise 'rosea'.