I removed the last one that was clearly wrong, Joy added that one as well as the others with permission from various vendor's sites (hover your mouse over the thumbnails to see the caption or enlarge them) and as often happens, they contain mistagged plants. In my opinion, the other 5 are all correct, you can clearly see the midrib markings along the petals. As you mentioned, soil and weather play a large part in how a plant blooms. I find that warmer more humid night time locations produce more curved and swirl, pinched, etc. on spider or unusual form daylilies, often enhancing other features, like the throat patterns. In cooler night areas such as where I live, they often produce a more stiff form as pictured by the last image.
After a new member posts their first 10 images, all images are automatically approved and go straight into the database. I try to scan new images to see if they are correct but I don't always catch everything, I do have a life outside of NGA
(as of this posting, we have 113,622 images of 82,870 daylilies listed!) So it also falls on all our members to help catch any errors .
If you ever see something that is questionable, just enlarge that image and scroll down to post a comment. It will then start a thread in the Photos Forum and will be seen by the image submitter and admin regularly scans that forum. You can also tag a certain admin member to bring their attention to that thread. I am the moderator for the daylily database so you can contact me anytime.