Tag Archives: Trees

Invasive Plant Factsheet: Chinese, Japanese & Siberian Crabapples (Malus hupehensis, M. floribunda, M. baccata)

2020 Invasive Plant Factsheet: Chinese, Japanese & Siberian Crabapples
Long favored for their spring flowering displays, some non-native crabapple trees introduced into the North America from Asia and Siberia as ornamental trees and rootstock have escaped from cultivation and naturalized in parts of Canada and south into Missouri and Virginia. Continue reading

Posted in Invasive Plants | Tagged , , , , , , ,

Invasive Plant Factsheet: Sweet Cherry & Higan Cherry (Prunus avium & P. subhirtella)

2020 Invasive Plant Factsheet: Sweet Cherry & Higan Cherry (Prunus avium & P. subhirtella)

Sweet Cherry and Higan Cherry are now listed as invasive in Northern Virginia and 13 counties in Maryland, with other alien cherry species considered a threat. Continue reading

Posted in Invasive Plants | Tagged , , , , ,

Invasive Plant Factsheet: Callery Pear (Pyrus calleryana)

2020 Invasive Plant Factsheet: Callery Pear (Pyrus calleryana)

This non-native tree, including the popular ‘Bradford’ cultivar, is now planted in high density in a variety of urban and suburban settings. It can spread aggressively outside cultivation. Wild forms develop traits of the original trees, including thorns. Continue reading

Posted in Invasive Plants | Tagged , , ,

Invasive Plant Factsheet: Non-Native Willows

2020 Invasive Plant Factsheet:
Non-Native Willows (Salix alba, S. babylonia & S. fragilis)
Brought to the U. S. in the 1700s by European settlers, these natives of Europe, Asia, and northern Africa have since escaped from cultivation and naturalized in minimally managed areas. Chinese weeping willow, Salix babylonica, is listed as invasive in Arlington. S. alba and its weeping cultivar (S. fragilis), which is often used in landscapes, are considered problematic in the City of Alexandria. Continue reading

Posted in Invasive Plants | Tagged , , , , ,