This plant came from Southeast Missouri & blooms in late May to early June.
SOLVED: please identify this wild plant.
It looks like a gladiola to me. It grows from a corm (bulb like) so it will die back in the winter to reemerge in spring.
Kind of reminds me of Gladiolus communis subsp. byzantinus because it is a more dainty one than the hybrids I see.
I checked for native gladiolus and found this to be almost identical. Meadow gladiolus Niidu-kurem§§k Gladiolus imbricatus. It said it is native to West & South Estonia but was found growing wild on my sister's property in Butler County, Missouri. I got a start from her & it is growing here in Dent County, Missouri. It's an ancestor of our garden gladiolus.