Plant ID? Any ideas?

[dicknormal]

This plant hangs along a steep bank where you wouldn't think a plant should even grow. It blossoms shortly after sundown and the following day the pedals wilt and turn pink by noon.

[Jack Hardin]

What is the location of plant? Some plants only grow in certain locations and it would help if we knew where, so it could be narrowed down.

[rmk800]

if it has 10 petals......Mentzelia decapetala.......Evening star

[dicknormal]

It's along the riverbank in Lethbridge and only 4 petals.

[Jayhad]

DL Plantsnap App to your phone, its free

[walking buffalo]

Looks like a variety of Evening Primrose.
Described like it too.

Gumbo Evening Primrose
Oenothera cespitosa

[dicknormal]

Thanks waking buffalo I had my mind stuck around Evening Star like rmk800
had suggested. I knew it wasn't that, I had found one of those plants several years ago. The Evening Star attracts some pretty impressive moths. This is a shot I got of the plant and a hummingbird moth. Don't recall the moth but I'm thinking a type of Sphinx moth. This was in the river bottom in Lethbridge also.

[Red Bullets]

Great shot of the moth and flower.
Regarding the tufted, gumbo evening primrose... the flowers have a nice fragrance. You could collect some seeds in August and propagate a few plants at home. The seeds need a 5 month outdoor cold moist stratification before direct seeding.