I discovered this blooming in a secluded niche over at Piedmont Park, and didn’t know really what it was, although the name “spider lily” came to mind….
Then, serendipity struck, and I came across a picture of a specimen that looked just like it, and found out (if my identification is correct) that this one indeed is probably Hymenocallis caroliniana, and is native to southeastern North America.
What a surprise!