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

1) Alnus glutinosa ssp. betuloides
Birch-leaved Alder
- Native to the mountains of eastern Turkey.
- Listed as a threatened species by the International Union for Conservation of Nature.
- Autumn brings pendulous male catkins and the mature female cones.
2) Catalpa x erubescens Indian Bean Tree
- Uncommon tree with fetching, large, chocolate-purple young leaves that turn green.
- Late summer brings masses of creamy white flowers flecked with yellow.
- Hanging seed pods appear and remain long after the leaves have dropped.
3) Pterocarya rhoifolia Japanese Wingnut
- The Wingnuts belong to the Walnut (Juglandaceae) family.
- The amount of edible nut is comparable to that of the Scots Pine, i.e. not much.
- The hanging decorative catkins give the tree a distinctive appearance in late summer.
4) Styrax obassia Fragrant Snowbell
- This tree produces 6-8 inch fragrant white bell shaped flowers May to June.
- Native to Hokkaido Island of Japan.
- The tiny green seed pods hang like ornaments well into late summer/fall.
5) X Sycoparrotia semidecidua Chinese Fig Hazel
- An inter-generic cross between two species – Parrotia persica and Sycopsis sinensis.
- The flowers are unique, inconspicuous and easy to overlook.
- The seed pods are beautiful ocher-colored, three dimensional stars.