Tree-of-Heaven (Ailanthus altissima) is a non-native, invasive, weed tree. With its fast growth and wide tolerance of growing conditions, Tree-of-Heaven was previously regarded as a desirable species. Reproducing by seeding and suckering, it aggressively colonizes open, sunny locations. This is a field or woodland edge species.

Large, foul smelling, pinnate compound leaves and commonly a reddish petiole help to determine this species. Gland tipped teeth occur at the base of the leaflets. Gray bark with short, vertical line-like ridges is distinctive. Fruit is single seeded in a twisted wing, up to 4.5 cm [1 ¾ inches] long, and sometimes it shows a reddish cast. Brownish, smooth, stout twigs with numerous lenticels and large leaf scars characterize Tree-of-Heaven.

Smooth Sumac (Rhus glabra) is a similar species that seldom attains tree size. It has finer toothed leaves without the foul smell or the glands. Leaf scars on Smooth Sumac practically circle the buds. There is no confusing this species if the red fruit is present.

 
Copyright 2021 by Donald Drife

Webpage Michigan Nature Guy
Follow MichiganNatureGuy on Facebook