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Invasive Plants

Some species of plants that are classified as “invasive plants” in PA are very ornamental, and may be present in your yard or garden; you may have even bought some of these plants at a nursery! Invasive plants are known to have invaded natural areas, and to have displaced native plants in their habitats. As native plants provide crucial food sources, shelter, and breeding grounds for wildlife, their disappearance from the landscape has far-reaching effects.

As a service to our members, and to promote ecologically sound gardening practices, the Hort Club is providing the following information for its members, to guide them in choosing only non-invasive plants to bring to plant exchanges.

Please note:
The following list contains only the most ornamental invasive plants common in this part of PA.

For a full listing of all invasive plants in PA, please follow this link to the DCNR website: http://www.dcnr.state.pa.us/Forestry/invasivetutorial/List.htm

TREES – Click the picture for a larger view. Click the back button to return to this page.

Norway Maple Acer platanoides L.i	Princess Tree Paulownia tomentosaii

SHRUBS – Click the picture for a larger view. Click the back button to return to this page.

Japanese Barberry Berberis thunbergii iii	Burning Bush Euonymus alatusiv
Multiflora Rosa Rosa multiflora v	Japanese Spiraea Spiraea japonicavi

FORBS – Click the picture for a larger view. Click the back button to return to this page.

Orange Daylily Hemerocallis fulva vii	Greater Celandine Chelidonium majus viii
Dame's Rocket Hesperis matronalis ix	Lesser Celandine Ranunculus ficaria x
Purple Loosestrife Lythrum salicaria xi	Japanese Knotweed Polygonum cuspidatum xii

VINES – Click the picture for a larger view. Click the back button to return to this page.

Periwinkle Vinca minor xiii	Bush Honeysuckles Lonicera japonica xiv

Photo Credits

1. Norway Maple – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2004
2. Princess Tree – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2002
3. Japanese Barberry – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2004
4. Burning Bush – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2002
5. Multiflora Rosa – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2002
6. Japanese Spiraea – Great Smoky Mountains National Park Resource Management Archive, USDI National Park Service, Bugwood.org
7. Orange Daylily – Richard Old, XID Services, Inc., Bugwood.org
8. Greater Celandine – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2004
9. Dame's Rocket – University Center for Instructional Media and Technology, IPANE, 2002
10. Lesser Celandine – Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
11. Purple Loosestrife – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2002
12. Japanese Knotweed – Mehrhoff, Leslie J., University of Connecticut, IPANE, 2002
13. Periwinkle – Dan Tenaglia, Missouriplants.com, Bugwood.org
14. Bush Honeysuckle – Leicht, Stacey, University of Connecticut, IPANE, 2004