Tag Archives: Trees

Invasive Plant Factsheet: Chinese & Siberian Elms (Ulmus parviflora & U. pumila)

2020 Invasive Plant Factsheet: Chinese & Siberian Elms (Ulmus parviflora & U. pumila) 
These trees are classified as invasive in 25 states, including Virginia, and are locally prolific. Their quickly developing fruits can be dispersed by wind away from landscape plantings, and grasslands and stream banks are vulnerable to infestation. Continue reading

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Invasive Plant Factsheet: Autumn Olive (Elaeagnus umbellata)

2020 Invasive Plant Factsheet: Autumn Olive (Elaeagnus umbellata)
Autumn Olive’s high seed production, as well as its adverse affect on the nitrogen cycle, now threaten native plant communities in many national parks in Virginia. Continue reading

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Invasive Plant Factsheet: Sawtooth Oak (Quercus acutissima)

2020 Invasive Plant Factsheet: Sawtooth Oak (Quercus acutissima)
Its rapid growth allows it to outcompete native oaks, and the dispersal by animals of its numerous acorns has caused it to become a problem species in forests along the east coast. Alexandria lists it invasive and Arlington designates is as a threat. Continue reading

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Invasive Plant Factsheet: Japanese Maple (Acer palmatum)

2020 Invasive Plant Factsheet: Japanese Maple (Acer palmatum)
Due to its prolific seeding, this tree can escape from cultivation and spread into forests and along roadsides and streams. It is listed as a problem plant by the Mid-Atlantic Exotic Pest Plant Council and is reported as invasive in nearby Rock Creek National Park. Continue reading

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