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Key to Identifying Common Colorado Landscape Trees – 34

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
      - 31b – Leaf is triangular or diamond/wedge-shaped — go to 32
        
        32b – Petiole is flat — go to 34

Current Step

34a – Form of tree is columnar — Lombardy Poplar

34b – Form of tree is tall, wide, open — Plains Cottonwood

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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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Colorado State University

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Key to Identifying Common Colorado Landscape Trees – 34

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