echinopsis oxygona or multiplex

been watching the stem lengthening and bud swelling since last week....  today the flower burst out....the plant is undistinguished but the flower is gorgeous hope you agree (see the long stem in extra}...it will last two days and nights before collapsing....seen in the wild in Rio Grande do Sul Brazil....propagation is easy and have lots of little ones in pots.... every year we just get one maybe someday a family of flowers