Plants with yellow or green flowers and opposite leaves - wetland
 Bidens beckii (Water-marigold) |
 Bidens frondosa (Common Beggarticks) |
 Bidens cernua (Nodding Beggarticks) |
 Bidens vulgata (Tall Beggarticks) |
 Helianthus nuttallii (Common Tall Sunflower) |
 Lonicera villosa (Blue Fly Honeysuckle) |
 Lysimachia ciliata (Fringed Loosestrife) |
 Lysimachia thyrsiflora (Tufted Loosestrife) |
 Mimulus glabratus (Smooth Monkey Flower) |
 Mimulus guttatus (Yellow Monkey Flower) |
 Rhinanthus minor (Yellow Rattle) |
 Urtica dioica (Stinging Nettle) |