I have em in my yard too, but at the present, they do not look like this pic. I see the orginal poster is in Canada area, so that may be why they full bloom in that pic.
Some people call them "Spider lillies
", I was always told they were called "Naked Ladies" due to in the fall of the year, a stalk shoots out of the ground, then the bud get bigger then opens (looks like flower
in pic), last of all the leaves shoot up and stay green all winter. During the late spring
the whole thing dies back. When I see Naked Ladies...Fall's around the corner.