Tree gardens

• Botanical gardens (Var.)
• Tree sanctuaries
• Rare boat (anag) — botanical tree gardens
• Sylvan showplaces
• Botanic-garden areas
• Wooded Gardens from retro artist sporting boater
• Where trees may be cultivated

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Arboretum \Ar`bo*re"tum\, n.; pl. Arboreta . [L., a place grown with trees.] A place in which a collection of rare trees and shrubs is cultivated for scientific or educational purposes.

WordNet Word definitions in WordNet
See arboretum