1) Aesculus x carnea ‘Fort McNair’
- A hybrid between A. pavia and A. hippocastanum, it probably originated as a chance hybrid made by insects in 19th-century Germany.
- Selected at the fort of the same name in Washington, D.C., flowers are pink with a yellow throat.
- It can be found on Azalea Way, across from the Woodland Garden.
2) Buddleja globosa
- A species of flowering plant endemic to Chile and Argentina, where it grows in dry and moist forest.
- It can be found at both ends of the Arboretum at the Holmdahl Rockery and in the Graham Visitor Center parking lot.
3) Embothrium coccineum (Chilean Fire tree)
- A small evergreen tree from the temperate forests of Chile and Argentina.
- The plant was introduced to Europe by William Lobb during his plant collecting expedition to the Valdivian temperate rain forests in 1845–1848. It was described by Kew Gardens thusly: ”Perhaps no tree cultivated in the open air in the British Isles gives so striking and brilliant a display as this does.”
- There are several small specimens in the Chilean Gateway, and one large one just north of the bus turnaround on Arboretum Drive.
4) Rhododendron x ‘Favor Major’
- Hybridized by L. De Rothschild, the founder of Exbury Gardens in the United Kingdom.
- A beautiful orange Azalea, located on Arboretum Drive at the Rhododendron Glen parking lots.
5) Syringa josikaea (Hungarian Lilac)
- A species of lilac native to central and eastern Europe, in the Carpathian Mountains in Hungary, Romania, and western Ukraine.
- Located in the Syringa Collection on Azalea Way, just south of the Woodland Garden.