Category Archives: Plants & Fungi

plants & fungi

Keep Eating!

Japanese beetle eating Japanese knotweed, Allegheny County, PA, June 2017 (photo by Kate St. John)
Japanese beetle eating Japanese knotweed, Allegheny County, PA, June 2017 (photo by Kate St. John)

Last month along the Panhandle Trail I paused to look at a wildflower near some Japanese knotweed when I noticed the knotweed was being eaten by Japanese beetles.  🙂

Japanese beetles (Popillia japonica) were introduced to North America by accident in the early 1900s and spread across the continent.  The adult beetles eat leaves, the larvae eat roots.  If you have roses, you’ve been battling Japanese beetles your entire life.

Japanese knotweed (Fallopia japonica) was introduced as a garden plant but is so aggressive that it chokes out native plants and even grows through asphalt.  As one of the world’s worst invasive species, it’s such a pest in Great Britain that as recently as five years ago you couldn’t get a mortgage if there was Japanese knotweed on the property. (That has since changed.)

Of course I was happy to see these two “Japanese” species together.  The beetles felt so at home on the knotweed that they were mating on it.

Japanese beetles mating on Japanese knotweed, Allegheny County, PA, June 2017 (photo by Kate St. John)
Japanese beetles mating on Japanese knotweed, Allegheny County, PA, June 2017 (photo by Kate St. John)

My hope is that the female beetles will drop to the ground below the knotweed and lay their eggs.  When the eggs hatch the larvae will burrow underground and eat the roots of nearby plants.

Good.  Eat the knotweed roots.  Eat the leaves.  Go on, Japanese beetles.  Keep eating!

 

(photos by Kate St. John)

Now Blooming

Turk's cap lily, Butler-Freeport Trail, 15 July 2017 (photo by Kate St. John)
Turk’s cap lily, Butler-Freeport Trail, 15 July 2017 (photo by Kate St. John)

In western Pennsylvania there aren’t many flowers in June but things start to get exciting in July. Here’s what I’ve seen in the past week.

It’s lily time! The Turk’s cap lily (Lilium superbum), above, is blooming along the Butler-Freeport Trail. The Canada lily (Lilium canadense), below, was blooming in Raccoon Creek State Park on July 9.

Canada Lily, Raccoon Creek State Park, 9 July 2017 (photo by Kate St. John)
Canada Lily, Raccoon Creek State Park, 9 July 2017 (photo by Kate St. John)

Tall meadow rue (Thalictrum pubescens) is also blooming everywhere.  This one was along Nichol Road at Raccoon.

Tall meadow rue, Raccoon Creek State Park, 9 July 2017 (photo by Kate St. John)
Tall meadow rue, Raccoon Creek State Park, 9 July 2017 (photo by Kate St. John)

And here’s a puzzle.  The photo is a nice “beauty shot” but doesn’t show enough of the flower for me to positively identify it. My best guess is woodland sunflower (Helianthus divaricatus).  I wish I’d taken photos of the stem!

Woodland sunflower perhaps, 9 July 2017 (photo by Kate St. John)
Woodland sunflower, perhaps, 9 July 2017 (photo by Kate St. John)

 

(photos by Kate St. John)

Railroad Flowers

Buddleja -- a.k.a.butterfly bush -- escaped cultivation in the U.K. (photo from Wikimedia Commons)
Buddleja — a.k.a.butterfly bush — escaped cultivation in the U.K. (photo from Wikimedia Commons)

While visiting England and Finland my husband and I traveled by train. (Wonderful transportation!  I wish we had good trains in the U.S.)  In both countries I noticed beautiful flowers blooming along the rail lines.  As I feared, the flowers are invasive.

 

England’s railroad flowers:

Buddleja davidii by the railroad in Germany (photo from Wikimedia Commons)
Buddleja davidii by the railroad in Germany (photo from Wikimedia Commons)

In England the railroad waste places are crowded with butterfly bush, Buddleja davidii (pronounced “BUD lee ah”).  Originally from central China and Japan, buddleja has many cultivars and is planted around the world for its beauty.  It’s now invasive in most temperate regions outside its homeland including England, New Zealand and North America.  Yes, it’s invasive in Pennsylvania.  Here are Three Reasons to Never Plant Butterfly Bush Again.

 

Finland’s railroad flowers:

Lupinus polyphyllus (photo from Wikimedia Commons)
Lupinus polyphyllus (photo from Wikimedia Commons)

In Finland I was surprised to see so much lupine because it’s a treat to see it growing wild in North America.  Unfortunately Lupinus polyphyllus was imported for Finnish gardens and has escaped to waste places along the roads and railways.  It’s everywhere!  When I remarked on its beauty our Finnish friends said, “It’s awful! Very hard to get rid of.”   Here’s some lupine by the railway, taken from inside the train to Helsinki.

Lupine along the railroad in Finland (photo taken from the train by Kate St. John)
Lupine along the railroad in Finland (photo taken from the train by Kate St. John)

Click here to read about five invasive species in Finland. The North American mink is one of them.

 

Pennsylvania’s railroad flowers:

Orange daylilies growing wild in PA, June 2017 (photo by Kate St. John)
Orange daylilies growing wild in PA, June 2017 (photo by Kate St. John)

Though it’s hard to find a passenger train in western Pennsylvania, we still use railroads for freight and, yes, we have railroad flowers.  Ours are orange daylilies (Hemerocallis fulva), a garden cultivar from East Asia that grows wild along roadsides and rail lines.  This gave it two nicknames:  Ditch Lily and Railroad Lily.

Orange daylily seeds are sterile so the plant spreads by fibrous roots and rhizomes. These are so hard to get rid of that the plant is invasive in Pennsylvania.

Many invasive plants line the roads and railways of the world.  Fortunately the railroad flowers are beautiful.

 

(most photos are from Wikimedia Commons; click on the images to see the originals.)

Invasive in Europe

Common milkweed (photo by Kate St.John)
Common milkweed (photo by Kate St.John)

Here’s a surprise.  Common milkweed (Asclepias syriaca) is listed as invasive in Europe!

In North America we’re urged to plant milkweed to provide food for monarch butterflies but in Europe it’s so out of control that people struggle to get rid of it.

What is missing in Europe that keeps common milkweed in balance with other plants here in North America?

If we could answer that question — in reverse — for Japanese knotweed (Fallopia japonica) we’d have happier landscapes in North America.

 

(photo by Kate St. John)

Heal-All in Bloom

Heal all in bloom (photo from Flora Pittsburghensis, Creative Commons license)
Heal all in bloom (photo from Flora Pittsburghensis, Creative Commons license)

Mid to late June is not a good time for wildflowers.  The woodland flowers have gone to seed and most field flowers haven’t opened yet so it’s hard to find anything blooming.  Heal-all (Prunella vulgaris) obliges. It blooms from June to September.

Heal-all or Self-heal is a member of the mint (Lamiaceae) family native to Europe, Asia and North America.  It’s not picky about sun and soil and it survives mowing so you’ll find it in waste places, lawns and along woodland edges. This photo from the Netherlands shows a typical setting.

Heal-all plants in bloom, Netherlands (photo from Wikimedia Commons)
Heal-all plants in bloom, Netherlands (photo from Wikimedia Commons)

Though it’s mixed in with other plants heal-all’s flower head stands up like a knob studded with small tubular flowers that range in color from deep purple to pale lavender-white.

If heal-all is annoying in your lawn consider this:  You can eat it or apply it as a poultice on wounds or irritated skin.

For another look at the flower and some musing about its presence in North America, see this vintage article from 2010: Heal All

 

(photo credits, Creative Commons licenses: top photo from Flora Pittsburghensis, second photo from Wikimedia Commons. Click on the images to see the originals)

Poison Hemlock

Poison hemlock flowers (photo from Wikimedia Commons)
Poison hemlock flowers (photo from Wikimedia Commons)

Speaking of poisons as I did yesterday, here’s a poisonous plant that’s probably growing in your neighborhood.  In late June it’s five to eight feet tall.

Poison hemlock (Conium maculatum) is an invasive weed made famous for killing Socrates.  Arrested and condemned to death, Socrates had to drink hemlock infusion as the capital punishment of ancient Greece. If you’re curious about what happened next, click here.

How do you know if it’s in your neighborhood?  Look for a member of the carrot/parsley family that has purple splotches on its stems, as shown below.

Purple-splotched poison hemlock stem (photo from Wikimedia Commons)
Poison hemlock stem (photo from Wikimedia Commons)

Find out more in this vintage article from June 2011: It’s Best To Know What You’re Dealing With

 

(photos from Wikimedia Commons. Click on the images to see the originals)

Nightshade in the Garden

Bittersweet Nightshade (photo by Chuck Tague)
Bittersweet Nightshade (photo by Chuck Tague)

Last week Anne Marie Bosnyak sent me a photo, below, of a plant that popped up in her garden.

It has purple flowers and tomato-like fruit. It’s obviously growing in the wrong place.  Is it a weed?

Bittersweet nightshade out of place in the garden (photo by Anne Marie Bosnyak)
Bittersweet nightshade out of place in the garden (photo by Anne Marie Bosnyak)

Well, yes.

It’s bittersweet nightshade (Solanum dulcamara), a perennial from Eurasia that’s considered invasive in Pennsylvania.

Did you know it’s related to potatoes?  Don’t eat it!  Read on.

Not Tomatoes

 

(flower photo by Chuck Tague, plant photo by Anne Marie Bosnyak)

Motherwort

Motherwort in bloom (photo by Kate St. John)
Motherwort in bloom (photo by Kate St. John)

Today … a plant.

Take a walk and you’ll find motherwort (Leonurus cardiaca) blooming now in western Pennsylvania.  Originally from Eurasia, this member of the Mint family is now at home on many continents because it’s useful as an herbal remedy for heart disease and childbirth.

Its flowers are furry dragon mouths arranged in whorls around the stem, similar in shape to purple deadnettle, a near relative.  Its square stem gives us the hint that it’s a mint.

In full sun motherwort is knee high or even taller so you won’t miss it.  Its opposite, toothed leaves look like paws but are sometimes confused with mugwort leaves.

Motherwort plant in Schenley Park, 30 May 2017 (photo by Kate St. John)
Motherwort plant in Schenley Park, 30 May 2017 (photo by Kate St. John)

I prefer to identify motherwort when it’s in bloom.  😉

 

(photos by Kate St. John)

Fluff In The Air

Cottonwood fluff on the ground (photo by Chris Evans, University of Illinois, Bugwood.org)
Cottonwood fluff on the ground (photo by Chris Evans, University of Illinois, Bugwood.org)

23 May 2017

In late May, you’ll see white fluff in the air as you search the sky for birds.  It’s not dandelion fluff.  This is cottonwood season.

The eastern cottonwood (Populus deltoides) grows in open and riparian habitats from the Rockies to the southeastern coast. Western Pennsylvania is on the eastern edge of their range.

Range map of the eastern cottonwood (image from Wikimedia Commons)

Cottonwoods are one of the fastest growing and largest trees in North America.  Reaching up to 130 feet tall the trunk can be more than five feet across.  The trees require bare soil and full sun to germinate so you usually see them out in the open, sometimes alone.

Eastern cottonwood (photo by Steven Katovich, USDA Forest Service, Bugwood.org)
Eastern cottonwood (photo by Steven Katovich, USDA Forest Service, Bugwood.org)

Their species name, deltoides, describes the leaf shape that looks a lot like aspens. Both trees are in the willow family.

Cottonwood leaves (photo by T. Davis Sydnor, The Ohio State University, Bugwood.org)
Cottonwood leaves (photo by T. Davis Sydnor, The Ohio State University, Bugwood.org)

In early spring cottonwoods sprout male and female catkins. The females are fertilized by wind-blown pollen and become drooping strings of seed capsules.  In May the capsules burst open to release thousands of tiny seeds, each one attached to a bit of “cotton” that carries it on the wind.  (The brown spots in this photo are seed capsule covers, not the seeds.)

Eastern cottonwood seeds, still on the branch (photo by Troy Evans, Great Smoky Mountains National Park, Bugwood.org)
Eastern cottonwood seeds, still on the branch (photo by Troy Evans, Great Smoky Mountains National Park, Bugwood.org)

The fluff breaks off and blows away but each tree is so prolific that in windless conditions, when the fluff falls straight to the ground, it looks like snow.

Do you want to see a lot of cottonwood fluff?  Drive north on Route 528 from the bridge over Moraine State Park‘s Lake Arthur. Eventually cottonwoods are on both sides of the road.

There’s fluff in the air there!

(photo credits:
fluff on the ground by Chris Evans, University of Illinois, Bugwood.org
range map from Wikimedia Commons; click on the image to see the original
clump of cottonwood trees by Steven Katovich, USDA Forest Service, Bugwood.org
cottonwood leaves by T. Davis Sydnor, The Ohio State University, Bugwood.org
cottonwood seeds on the branch by Troy Evans, Great Smoky Mountains National Park, Bugwood.org
)