TREES & plants

Tree and plant descriptions

  • Pignut hickory

    Carya glabra
    Pignut hickory is a large tree that has a tall, but relatively narrow crown. The bark is tight rather than shaggy and fall color is golden. The nuts produced are bitter tasting.
  • Pin cherry

    Prunus pensylvanica
    Plant Advice from the Morton Arboretum: Pin cherry is a fast-growing, slender tree reaching 30 feet tall with a narrow crown, often forming dense colonies. This short-lived tree is often found growing in sunny, dry soils and one of the first trees to appear after fires. Attractive, reddish brown bark is marked with horizontal bands of orange-colored lenticels. Difficult to find in nursery trade. Native to Midwest.
  • Pin oak

    Quercus palustris
    Pin oak is an Illinois native and has been widely planted in landscapes for many years. Unfortunately this tree suffers greatly from chlorosis (yellowing) of the leaves due to high soil pH. Pin oak is no longer recommended for landscapes in areas with high soil pH.
  • Possum-haw

    Ilex decidua
    Plant advice from The Morton Arboretum: Possum-haw is a type of holly, but one that will lose its leaves in autumn. Flowers are not showy, but the fruit that follows is.
  • Prairie crabapple

    Malus ioensis
    Prairie crabapple was once commonly found throughout the Midwest prairies and savannas. Spectacular in bloom, deep pink flower buds open to white flowers. Their fruit is popular with a myriad of wildlife. Unfortunately, prairie crabapple is susceptible to many foliar diseases.
  • Princeton elm

    Ulmus americana 'Princeton'
    The Princeton elm exhibits a high resistance to Dutch elm disease (DED) and demonstrates resistance to elm beetles as well. This large, fast-growing tree is tolerant of many adverse site conditions.
  • Prospector elm

    Ulmus wilsoniana 'Prospector'
    The Prospector elm is a hybrid of Asian elm species; it is smaller than the American elm and exhibits a high resistance to Dutch elm disease (DED) and elm leaf beetle. This fast-growing tree needs regular pruning to maintain its vase form. Its leaves emerge orange red and mature to green; in the fall, it erupts in a brilliant yellow. Useful as street, parkway, or shade tree.
  • Pumpkin ash (Not recommended)

    Fraxinus tomentosa
    Due to susceptibility to emerald ash borer (EAB), pumpkin ash is not recommended for planting anywhere in this region and usually requires removal and/or replacement. Disease-resistant cultivars may exist. Pumpkin ash is a large tree found primarily growing in wet habitats. This U.S. native can reach 80 feet tall with a narrow crown. Currently, ash trees cannot be sold in Illinois. Check with your state for quarantine restrictions.
  • Purple Coneflower

    Echinacea purpurea
    Plant advice from The Morton Arboretum: Purple coneflower is a native wildflower of Illinois and the Chicago Region. It offers color in the middle of summer and cones full of seeds for birds during winter.
  • Purple-flowering raspberry

    Rubus odoratus
    Plant advise from The Morton Arboretum: A large leaved, flowering raspberry with rose-purple flowers and red, drooping clusters of fruit. A good plant for large shade border, natural area or wildflower garden. Suckering plants form large colonies.