I agree that multiple (but not duplicate) images are important for this DB. A plant that blooms or shows beautiful fall leaf colors in my part of the world in mid-September may not elsewhere. When someone is interested in a plant they'd like to know what it could look like for them, in their growing area.
Filling in a bit of information in all of the fields should help interested individuals to be directed right to the image/information that they're looking for.
The thumbsup feature should ensure that the members' consensus as a group will control which images should show first from the data field.
Just my two-cents worth.
