Rare boat (anag) — botanical tree gardens

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

Wiktionary Word definitions in Wiktionary
n. (plural of arboretum English)

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.