I have a picture of pseudonarcissus. I don't think there is a pic already that shows the flower straight on. What do I do to submit it to be considered for the plant database?

Find the correct entry in the database by clicking on the Plant Database link in the menu bar.
This is the list I got when I did a search. https://garden.org/plants/sear...
Select which entry. On the left side is an 'Upload a Photo' link. Follow the steps, hit the submit button and it goes into a pending queue for admin approval.