The USA-NPN website will be temporarily unavailable for scheduled maintenance beginning late Sunday, July 26 through early Monday, July 27 (EDT). Thank you for your patience and understanding.
We are undertaking a major revision of our Nature's Notebook data collection app to make it easier and more fun to track plant and animal seasonal activity!
The expanded, leafy portion of a leaf or frond, which can be one entire unbroken leaf (simple) or a highly dissected and divided leaf (compound). Each plant species has specific characteristics for the leaf blade that can help with identification.