Betula albosinensis Betula albosinensis Betula albosinensis, the "'Chinese red birch"), syn. "B. bhojpattra" var. "sinensis", "B. utilis" var. "sinensis", is a species of birch in the family Betulaceae, native to Western China. It is a deciduous tree growing to . A particular feature is the peeling brown bark (cream when newly exposed). In fact the Latin specific name "albosinensis" means "white, from China". Brown catkins are produced in Spring. "Betula albosinensis" is grown as an ornamental tree for parks and large gardens, and numerous cultivars have been produced. The cultivars 'China Rose' and 'Red Panda' have gained the Royal Horticultural Society's Award
Alnus incana Alnus incana Alnus incana, the grey alder or speckled alder, is a species of alder with a wide range across the cooler parts of the Northern Hemisphere. It is a small- to medium-sized tree tall with smooth grey bark even in old age, its life span being a maximum of 60 to 100 years. The leaves are matte green, ovoid, long and broad. The flowers are catkins, appearing early in spring before the leaves emerge, the male catkins pendulous and long, the female catkins long and one cm broad when mature in late autumn. The seeds are small, long, and