Leighton Photography & Imaging

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  • While superficially it looks like your common dandelion, the common cat's-ear is an invasive Eurasian species of aster that has run wild in the Pacific Northwest, particularly west of the Cascade Mountains where it is listed as a noxious weed. This one was found about 15 miles to the northwest of Mount Rainier in Washington state in an open field by the Carbon River.
    Common Cat's-Ear
  • This little jewel of the forest floor is considered a noxious weed in Washington state (where this was photographed) and has taken over much of the Pacific Northwest. Native to Europe, this little geranium is one of hundreds of plants introduced as an attractive ornamental that escaped into the wild. Often called "Stinky Bob", crushing the leaves or stem will result in the strong odor of burning tires.
    Herb Robert
  • Musk thistle is a very spiky, invasive species from Eurasia and has now become a noxious weed throughout most of the world. This one was photographed in Logan County just outside of Sterling, Colorado.
    Musk Thistle
  • Found only along the Pacific coastline of Oregon and California, this beautiful pale purple to blue iris is found in wet habitats with fresh water, often in forested and open areas near the beach. This one was found growing in a small ravine where a small creek was flowing into a tidal pool below on Cape Perpetua on the Oregon Coast.
    Douglas Iris
  • Found only along the Pacific coastline of Oregon and California, this beautiful pale purple to blue iris is found in wet habitats with fresh water, often in forested and open areas near the beach. This one was found growing in a small ravine where a small creek was flowing into a tidal pool below on Cape Perpetua on the Oregon Coast.
    Douglas Iris
  • The highly controversial and extremely invasive Himalayan blackberry is might be considered the classic success story if looked at from the the view of this extremely aggressive invasive plant. Why it is called the Himalayan blackberry is a mystery to me, but it originally comes from Armenia and Iran. Introduced to the East Coast of the United States in 1885, it is believed it was confused with a similar European species of blackberry and with the help of local birds who absolutely love the berries, it had reached reached the West Coast of North America. This plant grows fast, easily outcompetes native foliage and is extremely tough to eradicate. On the plus side, this particular blackberry puts out bumper-crops of blackberries every summer that are absolutely delicious. I often see bushes laid out flat on the ground under the weight of all the berries. These were found growing in the Woodard Bay Conservation Area just outside of Olympia, Washington.
    Himalayan Blackberry (Rubus armeniacus)
  • When looking at the flower of the Himalayan blackberry, it's easy to see that it actually is a member of the rose family. A favorite of bees and loads of other wildlife who love the delicious sweet blackberries that come later in the summer, this highly invasive import which is actually from the Armenia area (not sure where the  Himalayan part of the name comes from)  thrives in the Pacific Northwest and is a major pest for gardeners and forest stewards all over the region. This one was found in the Woodard Bay Conservation Area just outside of Olympia, Washington on a beautiful summer afternoon.
    Himalayan Blackberry Flowers
  • Field bindweed is an invasive and non-native member of the morning glory family that is widespread across most of North America. Although it has very beautiful  flowers, it is considered a pest and nuisance in gardens, such as this one growing in a field in northeastern Colorado.
    Field Bindweed
  • This beautifully annoying field and garden pest is here to stay. This member of the morning glory family is found all over North America except Alaska, the Yukon, Northwest Territories. It is found in all Canadian provinces excluding Newfoundland and Labrador, and some of the Caribbean islands. This one was photographed in the Columbia River Gorge in Washington on the Washington-Oregon border.
    Field Bindweed
  • St. John's-wort has been a very important medicinal plant used to treat depression in many cultures. Although it is not native to North America, it can be found throughout most of the continent. This one was found growing in North Cascades National Park next to the Skagit River.
    St. John's-Wort
  • The invasive water-hyacinth while beautiful, clogs many wetlands and canals and is now designated as a federal noxious weed.
    Water-Hyacinth