Invasive species

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pink flowers with the words greater muskmallow - becoming innovative in north america
Greater Muskmallow - Becoming Invasive in North America
Malva alcea aka the Greater Musk Mallow or Hollyhock Mallow is a Eurasian perennial popular with gardeners. I rarely saw this in the wild until the past few years when I have started seeing it pop up in ditches all over the Pacific Northwest and southwards. If you have it, please do not allow it to go to seed, it clearly has some potent invasive potential! Instead, find out what is native to your area and grow those instead. The local bees and wildlife will love you for it!
Carduus nutans the Musk or Nodding Thistle is a Eurasian thistle that has been widely introduced all over North America. It out-competes native plants and pasture plants alike and creates physical barriers to the movement of animals and humans due to its sharp spiny thorns. Introduction is never intentional and is usually as a result of contaminated seed or hay. To read more about how to identify and control this noxious weed check out my blog! Seeds, Plants, Thistle Plant, Thistle, Dandelion, Thorns, Pasture
Carduus nutans Nodding THistle - Invasive Species of North America
Carduus nutans the Musk or Nodding Thistle is a Eurasian thistle that has been widely introduced all over North America. It out-competes native plants and pasture plants alike and creates physical barriers to the movement of animals and humans due to its sharp spiny thorns. Introduction is never intentional and is usually as a result of contaminated seed or hay. To read more about how to identify and control this noxious weed check out my blog!
Convolvulus arvensis Field Bindweed was one of the earliest weeds recognized as being invasive due to its detrimental effects on agriculture where it outcompetes other plants for water and nutrients. You can do your part by trying to control or where possible eradicate this invasive weed in your area. Since they readily regenerate from fragments of roots and stems any removed material must be burned or solarized before disposal. Field Bindweed, Agriculture, You Can Do, North America, Water
Convolvulus arvensis Field Bindweed - Invasive Species of North America
Convolvulus arvensis Field Bindweed was one of the earliest weeds recognized as being invasive due to its detrimental effects on agriculture where it outcompetes other plants for water and nutrients. You can do your part by trying to control or where possible eradicate this invasive weed in your area. Since they readily regenerate from fragments of roots and stems any removed material must be burned or solarized before disposal.
purple flowers are growing on the branches of trees
Wisteria sinensis Chinese Wisteria - Invasive Species of North America
Wisteria sinensis & W. floribunda, Chinese & Japanese Wisteria, are 2 invasive plants that are becoming problematic in North America. Despite this people still plant them in their gardens despite having so many lovely vines native to our region. Please do not plant this in your garden, its range is still expanding and all expansion is due to human introductions where they have escaped from cultivation through vegetative spread or carelessly disposed yard waste. For more info check out my blog!
a purple flower with the words pervinkles in front of it and an image of
Periwinkle Vinca major & V minor - Invasive Species of North America
Vinca major and Vinca minor the Periwinkles are a popular garden ornamental that often escapes cultivation and smothers native biodiversity. Since they only spread vegetatively all sources of invasion come from either deliberate plantings in gardens or from carelessly disposed yard waste piles. To learn more about this invasive species check out my blog.
Castor is an extremely invasive and extremely toxic woody perennial in the tropics and subtropics and herbaceous annual in temperate climates. As little as 3 seeds can cause severe gastrointestinal distress, liver or kidney failure or even death. It grows to 5 m tall & has very large palmate leaves making it supposedly desirable as an ornamental. But if people were more aware of its invasiveness and its toxicity to children, people and pets, then perhaps they would grow native species instead. People, Woody, Liver, Kidney, Annual
Ricinus communis the Castor Bean - Invasive Species of North America.
Castor is an extremely invasive and extremely toxic woody perennial in the tropics and subtropics and herbaceous annual in temperate climates. As little as 3 seeds can cause severe gastrointestinal distress, liver or kidney failure or even death. It grows to 5 m tall & has very large palmate leaves making it supposedly desirable as an ornamental. But if people were more aware of its invasiveness and its toxicity to children, people and pets, then perhaps they would grow native species instead.
This week's invasive species of North America  is Giant Hogweed Heracleum mantegazzianum. This massive plant causes severe phototoxicity causing blisters, permanent scarring and even blindness. Unfortunately it also has a native look-alike Cow Parsnip Heracleum maximum. Cow Parsnip is smaller, has smaller umbels & lacks the purple splotches on its stem. Giant Hogweed should be eradicated anywhere it is found, but know your plant ID so you do not unintentionally destroy a native species! Umbel, Cow Parsnip, Severe, Knowing You
Giant Hogweed Heracleum mantegazzianum - Invasive Species of North America
This week's invasive species of North America is Giant Hogweed Heracleum mantegazzianum. This massive plant causes severe phototoxicity causing blisters, permanent scarring and even blindness. Unfortunately it also has a native look-alike Cow Parsnip Heracleum maximum. Cow Parsnip is smaller, has smaller umbels & lacks the purple splotches on its stem. Giant Hogweed should be eradicated anywhere it is found, but know your plant ID so you do not unintentionally destroy a native species!
an image of some plants in the woods
Ilex aquifolium English Holly - Invasive Species of North America
Ilex aquifolium aka English, European, Christmas or Common Holly is becoming highly invasive in the moist climates of North America where it will invade both open areas and under the forest canopy where it is out-shading and outcompeting native understory species. We have two beautiful native hollies in eastern USA and western North America has abundant Oregon-Grape that can easily be grown instead and used in place of this invasive species. Grow native instead! To learn more check out my blog.
raspberries growing on the branch of a tree with leaves and berries around them
Himalayan Blackberries - Invasive Species of North America
Himalayan Blackberries are aggressive invasive species that are invading riparian areas, roadsides, forests and grasslands all over North America. The abundant delicious berries provide additional challenges for removal due to the heavy dependence by native wildlife on these non-native berries. To learn more about identification, control and removal of this species check out my blog.
Tamarisk or Saltcedar is a highly invasive genus of plants that are invading riparian areas all over North America. They accumulate salt in their tissues and make the environment less suitable for native species. Their long taproots allow them to invade a wide range of habitats as long as there is groundwater. To read more about this invasive species check out my blog. Reading, Salt, Groundwater, North, Taproot, Habitats
Tamarisk or Saltcedar - Invasive Species of North America
Tamarisk or Saltcedar is a highly invasive genus of plants that are invading riparian areas all over North America. They accumulate salt in their tissues and make the environment less suitable for native species. Their long taproots allow them to invade a wide range of habitats as long as there is groundwater. To read more about this invasive species check out my blog.
This week's invasive species focus is on the supposed sterile cultivar Bradford Pear and how it cross-pollinated to produce fertile invasive Callery Pear trees. To learn its description, distribution, uses and control methods check out my blog. Fertility, Bradford Pear, Pear Trees, Sterile, Produce
Bradford or Callery Pear - Invasive Species of North America
This week's invasive species focus is on the supposed sterile cultivar Bradford Pear and how it cross-pollinated to produce fertile invasive Callery Pear trees. To learn its description, distribution, uses and control methods check out my blog.
Japanese Knotweed, False Bamboo Reynoutria japonica is this week's feature in Invasive Species of North America. Learn to identify it, how it spread, its distribution and how to remove it. Bamboo, Plant Leaves, Japonica
Japanese Knotweed - Invasive Species of North America
Japanese Knotweed, False Bamboo Reynoutria japonica is this week's feature in Invasive Species of North America. Learn to identify it, how it spread, its distribution and how to remove it.
Milk Thistle Silybum marianum #InvasiveSpecies of #NorthAmerica. Learn its description, distribution, uses, making #medicine from it and how to remove infestations of it. Check it out at: https://lyraenatureblog.com/blog/milk-thistle-silybum-marianum/ Health, Glow, Herbal Medicine, Effects Of Turmeric, Turmeric Side Effects, Milk Thistle Benefits, Milk Thistle Uses, Milk Thistle Extract, Detox Juice
Milk Thistle Silybum marianum Invasive Species of North America
Milk Thistle Silybum marianum #InvasiveSpecies of #NorthAmerica. Learn its description, distribution, uses, making #medicine from it and how to remove infestations of it. Check it out at: https://lyraenatureblog.com/blog/milk-thistle-silybum-marianum/
This invasive species of the week is Purple Loosestrife, Lythrum salicaria. Purple Loosestrife aggressively invades wetland habitats and creates monocultures. Learn how to identify it, how it spreads, where it is found in North America, and how to remove it. Lythrum Salicaria, Japanese Inspired Garden, Bamboo Species, Wisteria Plant, Autumn Clematis, Permaculture Design, Blue And Purple Flowers
Lythrum salicaria Purple Loosestrife - Invasive Species of North America
This invasive species of the week is Purple Loosestrife, Lythrum salicaria. Purple Loosestrife aggressively invades wetland habitats and creates monocultures. Learn how to identify it, how it spreads, where it is found in North America, and how to remove it.
Introducing my newest blog category on invasive species of North America.  Learn what invasive species are, what makes them invasive and what you can do to help.  Each week I will be posting information on a different invasive organism and ways that they can be controlled. What You Can Do, Category, News Blog, Blog Categories
What are Invasive Species and What Should We Do About Them?
Introducing my newest blog category on invasive species of North America. Learn what invasive species are, what makes them invasive and what you can do to help. Each week I will be posting information on a different invasive organism and ways that they can be controlled.