Previous Steps

• 1b – Alternate leaf arrangement on stem — go to 18
  • 18a – Leaf simple — go to 19
    • 19b – Thornless — go to 22
      • 22e – All leaves unlobed — go to 31

• 31a – Leaf is triangular or diamond/wedge-shaped — go to 32

• 31b – Leaf is round or heart-shaped — go to 35

• 31c – Leaf is long and narrow (3-4 times longer than wide) — go to 37

• 31d – Leaf is oval or oblong (twice as long as wide) — go to 40

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