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Key to Identifying Common Colorado Landscape Trees – 44

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
      - 31d – Leaf is oval or oblong (twice as long as wide) — go to 40
        
        40b – Leaf base symmetrical — go to 43
        
        43b – Leaf margin not wavy or only slightly wavy; margin obviously toothed — go to 44

Current Step

44a – Petiole 1-3 inches long — Lanceleaf Cottonwood

44b – Petiole less than 1 inch long — go to 45

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Colorado State Extension Master Gardeners work to enhance Coloradans’ quality of life by extending knowledge-based education to local communities, helping individuals make informed decisions about plants and fostering successful gardeners while protecting neighborhood environments.

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