What a great idea, thanks for suggesting it! This morning I implemented this feature. Here's how to make it work:
Go to the user's profile page (click on their username).
Then under "Plant Database Contributions:" click on the first link (their images).
Now you will see at the top a pulldown menu containing (alphabetically) all the genera of the images they have uploaded. Choose one and click Update View and you'll then see only images they have posted to that genus.
Works great! And it's fun to look at your own photos and see what genera you've uploaded.
