Flower through a porthole

Last photo in my "Porthole macro photos" series!
I took these photos with my lame w595 phone camera plus my dad's old vivitar wide angle lens (best trick to take macro shoots with a cellphone ^^)

I precised "through porthole" in the title because the original photo had an awful round vignette that made me think of an actual porthole :-p

Sadly, I don't know what this flower is called :-/