Tree of Heaven (Ailanthus altissima)

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Division - Magnoliaphyta
Class - Magnoliopsida
Subclass - Rosidae
Order - Sapindales
Family - Simaroubaceae
Genus - Ailanthus


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Tree of Heaven resembles sumac, but can be differentiated by the leaf-shape, which features dentation at the bottom near the stem, but goes straight further up the leaf. This is one of the most destructive of city weeds. It is highly invasive and tears apart concrete.

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