Cylburn Arboretum [pronounced sil·brn aar·br·ee·tm] is a city park with arboretum and gardens, located at 4915 Greenspring Avenue, Baltimore, Maryland. It is open daily – excluding Mondays – without charge. The Cylburn Mansion houses a display of watercolor paintings of Maryland wildflowers that is open to the public. Today the arboretum contains an extensive collection of trees and woody shrubs based loosely on the Tysons' original plantings. Collections include azaleas, bamboo, beeches, boxwoods, chestnuts, conifers, hollies, Japanese maples, magnolias, maples, Maryland oaks, and viburnum.