leafs and stalk look like maxima to me but these weren't all that tall, maybe 2-3'?
Wise County, Tx in calcareous soil at transition between Fort Worth Prairie & Western Cross Timbers Main Belt.
Went up towards Wise County to enjoy some of the LBJ Grasslands. It's fantastic!!! Spotted lots of nature. :)
The leaves make me think Stillingia.
Will watch for flowers to bloom & upload again. In creek bed.