• Olympic: Three Parks in One

    Olympic

    National Park Washington

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  • Spruce Railroad Trail Closed from Lyre River Trailhead to Devil’s Punchbowl

    The trail will be closed for improvements from the Lyre River TH to approximately 0.25 miles east of Devil’s Punchbowl. Work is expected to be completed by the end of October. The remainder of the trail will be accessible from the Camp David Jr. Road TH. More »

  • Safety Advisory: Mountain Goats

    NPS has received reports of aggressive mountain goats near trails at Hurricane Ridge, Royal Basin, Seven Lakes Basin, Lake of the Angeles, & Grand Pass. Visitors are required to maintain a distance of at least 50 yards from all wildlife. More »

English Holly

English Holly

English holly leaves are edged with sharp spines.

NPS Exotic Plant Management Team

Ilex aquifolium

English holly was introduced to the Puget Sound region as an ornamental and later cultivated on holly farms for the floral industry. It is now an escapee threatening native habitats.

Identification:

English holly is an evergreen tree with a dense conical growth of short branches. It can grow up to 50 feet tall and one-and-a-half feet in diameter. Leaves are oval with spiny points and wavy edges; they are stiff and leathery, shiny dark green above and paler beneath. The tree’s bark is gray and smooth or nearly smooth. Twigs are greenish to purplish. Female flowers (which mature into fruit) and male flowers (which produce only pollen) are found on separate plants. Holly fruit is berrylike, shiny red, and contains four nutlets.

Look-a-likes:

  • Native Oregon grape species with waxy slightly-pointed leaves could be confused with holly.

How is it spreading and where?

English holly was introduced from southern Europe, northern Africa, and western Asia. It is an escaped ornamental, now widely distributed. It grows from seeds and is spread by birds. It is shade tolerant and can live in undisturbed forested sites. It can displace native conifers like Douglas-fir or Sitka spruce.

English holly is widely established in lowland areas of Olympic National Park, such as near the Mora ranger station.

 
English Holly

English holly saplings

NPS Exotic Plant Management Team

Control in Olympic:

Small English holly trees are hand-pulled. Larger trees are cut and berries collected and removed. Stumps of felled trees are treated with herbicide.

For more information, see Weed Resources.

Back to Invasive Plants

Did You Know?

View of the Elwha Valley

Did you know that in 1988, Congress designated 95% of Olympic National Park as Wilderness. The Olympic Wilderness is a part of the National Wilderness Preservation System. More...