Previous Steps

• 1a – Opposite leaf arrangement on stem — go to 2
  • 2a – Leaf simple — go to 3
    • 3a – Leaves are lobed — go to 4
      • 4b – No milky sap — go to 5
        • 5b – Margins of lobes are toothed — go to 7
          • 7a – Three to five lobes – — go to 8

Current Step

• • 8a – Middle lobe twice as long as other lobes — go to 9

• • 8b – Lobes fairly similar in size. Base of middle lobe is wide. Sinuses are V-shaped and toothed — go to 10

Resources

• Identifying Broadleaf Flowering Trees and Shrubs, CMG GardenNotes #173
• List of trees in this key
• Glossary of Terms
• Front Range Tree Recommendation List
• Online CSU Extension publications on Tree and Shrub Selection