Get aeroallergen readings for Elm.

Important genera:

Elm (Ulmus) and Hackberry (Celtis)

Tree pollen is dominant in the spring.
Elm pollen season extends from February to April.
Hackberry pollen season extends from March to May.

Elm and Hackberry trees in Missouri:

• American Elm (Ulmus americana)
• Winged Elm or Wahoo (Ulmus alata)
• Slippery Elm (Ulmus rubra)
• Siberian or Dwarf Elm (Ulmus pumila)
• Hackberry (Celtis occidentalis)
• Dwarf Hackberry (Celtis tenuifolia)
• Sugarberry or Southern Hackberry (Celtis laevigata)

Facts about Elm and Hackberry

• American elm's vase-like form makes it one of the most prized ornamental and shade trees in the United States.
• The variations of hackberry species are still undergoing revision.

Elm and Hackberry Allergenicity

• Elm is reported to be highly allergenic.
• Hackberry (C. occidentalis) is considered to be the most important allergenic tree of all hackberries in causing hay fever.