August Color Appears at the Washington Park Arboretum (Part II)

1) Aralia elata (Japanese Angelica Tree)
- Natural range: Japan, Korea, Russian Far East
- Can be a tree more than 30 feet tall. Ours are multiple suckers from a spreading root system.
- Located north of the Wilcox footbridge (40-3W).
2) Bupleurum fruticosum
- A dense, multi-stemmed shrub tolerant of exposure and poor soil.
- Native to Southern Europe and the Mediterranean.
- Located in our Rock Rose area west of the Sorbus Collection (21-3E).
3) Kalopanax septemlobus
- A member of the Aralia family (Araliaceae), it grows to 100 feet. Its lobed leaves might be mistaken for maple until the umbels of flowers appear in July and August.
- Native to Japan, Korea, and the Russian Far East.
- Our best is located west of Azalea Way in 15-1W.
4) Poliothyrsis sinensis
- Native to the Chinese province of Hupeh
- Bears clusters of fragrant white flowers
- Located south of the Woodland Garden near other so-called primitive trees: Trochodendron, Tetracentron, and Euptelia.
5) Rosa sp. with Spiny Rose Gall
- These galls are caused by a tiny wasp, probably Dipolepis bicolor, which lays its eggs in the rose’s leaves. The larvae live in the galls until the following spring.
- This plant is located in 25-1E at the intersection of the Upper and Lower Trails.