English: The photographers identified the plant as Datura wrightii (Downy Thorn-apple, Indian-apple). In Wikimedia, the name was changed to Datura inoxia for some of these photos. In fact, taxonomy is being discussed (as of 2020). According to A. S. Weakley, Datura inoxia may or may not “be distinct from D. wrightii. It is currently not known with confidence which records in our area apply to which taxon.”
Three images from the same place and date belong together: flower (top view), flower (side view), fruit (seed pods).
The photographers commented: “Member of the nightshade family, so the plant is toxic and supposed to smell bad, but I did not notice.”
The photographers’ Flickr tags suggest that the photo was taken in Amistad National Recreation Area or near Lake Amistad, Val Verde County, Texas.
Weakley, A. S. 2020. Flora of the southeastern United States: Texas. University of North Carolina Herbarium, North Carolina Botanical Garden. p. 617 (download page)