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Key to Identifying Common Colorado Landscape Trees – 27

Previous Steps

1b – Alternate leaf arrangement on stem — go to 18
- 18a – Leaf simple — go to 19
  - 19b – Thornless — go to 22
    - 22d – All leaves lobed — go to 23
      - 23a – Pinnate ventation — go to 24
        
        24a – Leaves clustered towards stem tip. Pith is 5-angled or star-shaped — go to 25
        
        25b – Tips of lobes are rounded or blunt; no bristles at tips of lobes — go to 27

Current Step

27a – Leaf base has tiny “earlobes”. Blue-green beneath — English Oak

27b – Leaf base is wedge-shaped or round. White-gray and hairy beneath — go to 28

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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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