Fleur: If you'd like to find an exact ID for a plant, you can post photos over on our Plant Identification forum:
http://garden.org/forums/view/... We have some very knowledgeable members here on ATP who've helped me identify plants on many an occasion! Once you get an exact ID you can add your photos to the correct entry in the database!
Many plants in the database have a "General" or "Parent Plant" entry which provides information pertaining to plants in that particular genus. I think when someone recognizes a photo in the general plant entry as a particular species or cultivar they can propose to move it to the correct database location.