Missouri Botanical Garden
Missouri Botanical Garden: Temperate Deciduous Forest Leaf Identification
You identify deciduous trees by the shapes of their leaves. Link to complete tutorial on types of leaves.
University of Nebraska
University of Nebraska State Museum: Pollen Detective: About Pollen
Twelve different species of plant pollen are highlighted in this engaging resource. For each plant you can view pollen as seen under two different kinds of microscopes. Reproductive cycles and physical traits used for identification are...