Related Clues:

• Some street-lining trees
• Trees targeted by leaf beetles
• Trees related to zelkovas
• Hardy shade trees
• Trees with a Chinese species
• Trees that orioles like
• Trees that canopy Central Park's Literary Walk
• Trees with helicopter seeds
• Trees (prone to a disease identified in the Netherlands)
• Trees in a Eugene O'Neill title
• Endangered trees
• Many Central Park trees
• Many New Haven trees
• Shade sources on streets
• Trees with many streets named after them