Alnus 'Imperialis'Alnus Glutinosa Imperialis more commonly known as the Cut Leaved Alder, really impresses with its picturesque, bamboo like structure. From a distance, it is actually difficult to differentiate whether it is an alder or a bamboo. It is a medium sized tree with slender, funnel shaped upright central stems and bamboo like arched branches. These trees are mainly used for planting on moist and wet sites, perfect solitaire for waterfront gardens or grass