You can click on the thumbs up to the photo you would like to show as the thumbnail. If you already clicked the thumbs up on the cotton boll, click again and it will take the thumbs up away. Then click the leaf photo you would like to see as the thumbnail. : )
By the way, great photos.
If you go to the bottom of the page you can click on Edit Plant Name. There you will see the area where you can add more common names.
